# QNT 275 Entire Course - The Latest Verson

Entire Course Download Link:

https://uopcourses.com/category/qnt-275/

question

Which of the following variables is

qualitative?

o

Height

o

Temperature

o

Gender

o

Weight

·

question

A recent survey of 200 small firms (annual

revenue less than $10 million) asked whether an increase in the minimum wage

would cause the firm to decrease capital spending. Possible responses to the

survey question were: "Yes," "No," or "Don't

Know." These data are

____________.

o

Nominal Scale

o

Ratio Scale

o

Interval Scale

o

Ordinal Scale

·

question

Which of the following represents a

population and a sample from that population?

o

Teachers in a high school and members of the

parent teacher group

o

Residents

of Albany, New York, and registered voters in Albany, New York

o

Freshmen at St. Joseph's University and

basketball players at St. Joseph's University

o

Fans at a concert who purchase t-shirts and

fans at a concert who purchase soda

·

question

Which of the following variables is quantitative?

o

Religious

Affiliation

o

Gender

o

Marital Status

o

Temperature

·

question

The accompanying chart shows the numbers of

books written by each author in a collection of cookbooks. What type of chart

is this?

o

Bar

chart for quantitative data

o

Frequency histogram for quantitative data

o

Bar chart for qualitative data

o

Frequency histogram for qualitative data

·

question

In order to summarize qualitative data, a

useful tool is a __________.

o

Frequency Distribution

o

Line Graph

o

Histogram

o

Stem-and-Leaf

Diagram

·

question

ABC Plumbing

wants to understand its customers’ perceptions of the quality of the company’s

plumbing service calls. They plan to survey a sample of its customer base. What

will ABC need to do to ensure that their data is valid and reliable?

o

The survey must

include items that ask customers about their plumbing experiences, the survey

sample must include the first 15 customers off the customer database, and the

survey method must be repeatable.

o

The survey must include items that ask customers to rate

the quality of plumbing service calls, the survey sample must represent all

parts of the customer population, and the survey method must be repeatable.

o

The survey must

include items that ask customers to rate the appearance of the plumbing store,

the survey must include all customers, and the survey method must include

setting up a table outside the local dollar store.

o

The survey must

include items that ask customers to rate the friendliness of the receptionist,

the survey must include all customers from the north side of the city, and the

survey method must appeal to all respondents.

·

question

A stem-and-leaf diagram is constructed by separating each

value of a data set into two parts. What are these parts?

o

Stem

consisting of the leftmost digits and leaf consisting of the second digit

o

Stem consisting of the second digit and leaf

consisting of the last digit

o

Stem consisting of the leftmost digits and

leaf consisting of the last digit

o

Stem consisting of the last digit and leaf

consisting of the leftmost digits

·

question

A population consists of _________________.

o

a subject of interest in a sample

o

all

items of interest in a statistical problem

o

all items of interest in a sample

o

a subject of interest in a statistical

problem

Week 3 CLO Business Decision Making Project Part 1

·

question

What does it mean when we say that the tails of the

normal curve are asymptotic to the

o

The tails gets closer and closer to the x axis and

eventually touch it.

o

The tails get closer and closer to the x axis and

eventually cross this axis.

o

The tails get

closer and closer to the x axis but never touch it.

o

The tails get closer and closer to the x axis and

eventually become this axis.

question

You work in marketing for a company that

produces work boots. Quality control has sent you a memo detailing the length

of time before the boots wear out under heavy use. They find that the boots

wear out in an average of 208 days, but the exact amount of time varies, following

a normal distribution with a standard deviation of 14 days. For an upcoming ad

campaign, you need to know the percent of the pairs that last longer than six

months-that is, 180 days. Use the empirical rule to approximate this percent.

o

95%

o

2.5%

o

97.5%

o

5%

·

·

question

For any normally distributed random

variable with mean

fall between and is

o

95%

o

16%

o

68%

o

32%

·

·

question

A continuous random variable has the uniform distribution

on the interval [

___________.

o

is constant for all x between a and b, and 0 otherwise

o

is bell-shaped between a and b

o

is symmetric

around its mean

o

asymptotically approaches the x axis when x increases to

+∞ or decreases to -∞

·

·

·

question

Mutually exclusive and collectively

exhaustive events _______________.

o

do not have to contain all outcomes in a sample space and

may share common outcomes

o

contain all

outcomes in a sample space and do not share common outcomes.

o

contain all outcomes in a sample space and may share

common outcomes

o

do not have to contain all outcomes in a sample space but

do not share common outcomes

·

·

·

·

question

What is probability?

o

Any value between 0 and 1 is always treated as a

probability of an event.

o

A value between 0

and 1 assigned to an event that measures the likelihood of its occurrence.

o

A value between 0 and 1 assigned to an event that

measures the unlikelihood of its occurrence.

o

A numerical value assigned to an event that measures the

number of its occurrences.

·

·

·

question

Which of the following can be represented by a continuous

random variable?

o

The number of arrivals to a drive-thru bank window in a

four-hour period

o

The number of defective light bulbs in a sample of 5

o

The score of a randomly selected student on a

five-question multiple-choice quiz

o

The time of a

flight between Chicago and New York

·

·

·

·

question

Which of the following is correct?

o

A continuous random variable has a probability density

function but not a cumulative distribution function.

o

A continuous

random variable has a probability density function, and a discrete random

variable has a probability mass function.

o

A discrete random variable has a probability mass

function but not a cumulative distribution function.

o

A continuous random variable has a probability mass

function, and a discrete random variable has a probability density function.

·

·

·

question

Which of the following can be represented by a discrete

random variable?

o

The finishing time of participants in a cross-country

meet

o

The number of

obtained spots when rolling a six-sided die

o

The average outside temperature taken every day for two

weeks

o

The height of college students

·

·

·

·

question

The probability that a normal random variable is less

than its mean is ____.

o

Cannot be determined

o

0.0

o

1.0

o

0.5

Week 4 CLO Business Decision Making Project, Part 2

question

For a given set of explanatory variables,

in general:

o

a confidence

interval is narrower than a prediction interval.

o

a confidence interval is wider than a prediction

interval.

o

The width of a confidence interval cannot be determined.

o

the width of a confidence interval is the same as the

width of a prediction interval.

·

question

The standard error of the estimate measures:

o

the variability of

the observed y-values around the predicted y-values.

o

the variability of the predicted y-values around the mean

of the observed y-values.

o

the variability of the values of the sample regression

coefficients.

o

the variability of the explanatory variables.

·

question

In a simple linear regression model, if the plots on a

scatter diagram lie on a straight line, what is the standard error of the

estimate?

o

+1

o

-1

o

Infinity

o

0

·

question

Which of the following variables is not

qualitative?

o

Gender of a person

o

Religious affiliation

o

Student's status (freshman, sophomore, etc.)

o

Number of

dependents claimed on a tax return

·

question

Consider the following simple linear regression

model: The response variable is:

o

β0

o

x

o

y

o

ε

·

·

·

·

question

Another name for an explanatory variable is the

___.

o

descriptive variable

o

independent

variable

o

inferred variable

o

dependent variable

·

·

·

·

·

question

Serial correlation is typically observed in:

o

outliers.

o

sparse data.

o

cross-sectional

data.

o

time series data.

·

question

Consider the following simple linear

regression model:

o

the unknown

parameters.

o

the random error terms.

o

the response variables.

o

the explanatory variables.

·

question

What is the name of the variable that's

used to predict another variable?

o

Coefficient of Determination

o

Standard Error of the Estimate

o

Response

o

Explanatory

·

question

Which of the following violates the assumptions of

regression analysis?

o

The error term has a constant variance.

o

The error term has a zero mean.

o

The error term is normally distributed.

o

The error term is

correlated with an explanatory variable.

Week 5 CLO Business Decision Making Project, Part 3:

Signature Assignment

https://uopcourses.com/category/qnt-275/

**QNT/275****STATISTICS FOR DECISION MAKING****The Latest Version A+ Study Guide**

**Download Link:**

**https://uopcourses.com/category/qnt-275/**

**Week 1 Statistics in Business****Write**a 525- to 700-word response that addresses the following prompts:- Define
*statistics*with citation and reference. - Contrast quantitative data and qualitative data with citation and reference.
- Describe the levels of data measurement.
- Describe the role of statistics in business decision-making.
- Provide at least two business research questions, or problem situations, in which statistics was used or could be used.

**Copy**and**paste**the five prompts above into a Microsoft® Word document and write a response below each prompt. Add an APA title page to your document. Use APA quotation, citation, and reference format for all sources used.**Click**the Assignment Files tab to submit your assignment.Week 2 Activity Data Set**Resource:**University of Phoenix Material: Data Set**Review**the following business scenario:You are the manager in a small town in the lake district of a Midwestern state enjoys a robust tourist season during the summer months, but has only a small population of residents during the off season. The Littletown Café adjusts the levels of staff according to the time of year, to coincide with the number of guests, with the tourist season typically starting around Memorial Day each year. One wait staff employee can serve 50 guests. When a bus staff employee is added, the pair can serve 75 guests. At 76 guests, the café adds a second wait staff employee, for a total of 2 waiters and one busser. Analysis of guest numbers can support future decisions about scheduling wait staff, dishwashers, and bus staff for the café.**Download**the data set.**Review**the data in the data set.**Write**a 700- to 1,050-word paper in which you:- Explain why this is (or is not) a suitable sample of quantitative data for the business scenario.
- Evaluate the factors that would affect the validity of the data set.
- Evaluate the factors that would affect the reliability of the data set.
- Explain the steps you took to arrive at your conclusion about validity and reliability.
- Display the data set in a chart.
- Explain briefly why that chart type was selected.
- Calculate the measures of central tendency and variability (mean, median, mode, standard deviation) for the data.
- Explain the steps you followed to come your answer.
- Interpret the measures of central tendency and variability.What are three conclusions you can draw based on the data analysis?

**Click**the Assignment Files tab to submit your assignment.

**Week 2 Quiz**· ·question

**1**Which of the following variables is

qualitative?

o

Height

o

Temperature

o

Gender

o

Weight

·

question

**2**A recent survey of 200 small firms (annual

revenue less than $10 million) asked whether an increase in the minimum wage

would cause the firm to decrease capital spending. Possible responses to the

survey question were: "Yes," "No," or "Don't

Know." These data are

*best*classified as____________.

o

Nominal Scale

o

Ratio Scale

o

Interval Scale

o

Ordinal Scale

·

question

**3**Which of the following represents a

population and a sample from that population?

o

Teachers in a high school and members of the

parent teacher group

o

Residents

of Albany, New York, and registered voters in Albany, New York

o

Freshmen at St. Joseph's University and

basketball players at St. Joseph's University

o

Fans at a concert who purchase t-shirts and

fans at a concert who purchase soda

·

question

**4**Which of the following variables is quantitative?

o

Religious

Affiliation

o

Gender

o

Marital Status

o

Temperature

·

question

**5**The accompanying chart shows the numbers of

books written by each author in a collection of cookbooks. What type of chart

is this?

o

Bar

chart for quantitative data

o

Frequency histogram for quantitative data

o

Bar chart for qualitative data

o

Frequency histogram for qualitative data

·

question

**6**In order to summarize qualitative data, a

useful tool is a __________.

o

Frequency Distribution

o

Line Graph

o

Histogram

o

Stem-and-Leaf

Diagram

·

question

**7**ABC Plumbing

wants to understand its customers’ perceptions of the quality of the company’s

plumbing service calls. They plan to survey a sample of its customer base. What

will ABC need to do to ensure that their data is valid and reliable?

o

The survey must

include items that ask customers about their plumbing experiences, the survey

sample must include the first 15 customers off the customer database, and the

survey method must be repeatable.

o

The survey must include items that ask customers to rate

the quality of plumbing service calls, the survey sample must represent all

parts of the customer population, and the survey method must be repeatable.

o

The survey must

include items that ask customers to rate the appearance of the plumbing store,

the survey must include all customers, and the survey method must include

setting up a table outside the local dollar store.

o

The survey must

include items that ask customers to rate the friendliness of the receptionist,

the survey must include all customers from the north side of the city, and the

survey method must appeal to all respondents.

·

question

**8**A stem-and-leaf diagram is constructed by separating each

value of a data set into two parts. What are these parts?

o

Stem

consisting of the leftmost digits and leaf consisting of the second digit

o

Stem consisting of the second digit and leaf

consisting of the last digit

o

Stem consisting of the leftmost digits and

leaf consisting of the last digit

o

Stem consisting of the last digit and leaf

consisting of the leftmost digits

·

question

**9**A population consists of _________________.

o

a subject of interest in a sample

o

all

items of interest in a statistical problem

o

all items of interest in a sample

o

a subject of interest in a statistical

problem

Week 3 CLO Business Decision Making Project Part 1

**Identify**a business problem or opportunity at a company where you work or with which you’re familiar. This will be a business problem that you use for the individual assignments in Week 3-5. You will chose a company and identify an opportunity or problem that you can analyze and thus better understand that problem or opportunity.**Identify**a research variable within the problem/opportunity that could be measured with some type of data collection.**Consider**methods for collecting a suitable sample of either qualitative or quantitative data for the variable. Consider**how you will know if the data collection method would be valid and reliable.****Write**a 700- to 1,050-word description of the company, problem, and variable.**Include**in your submission:- Identify the name and description of the selected company,
- Describe the problem at that company,
- Identify one research variable from that problem,
- Describe the methods you would use for collecting a suitable sample of either qualitative or quantitative data for the variable (NOTE: do not actually collect any data)
- Analyze how you will know if the data collection method would generate valid and reliable data (
*Note*: do not actually collect any data)

**Format**your paper consistent with APA guidelines using the New APA Paper Template provided at right.**Click**the Assignment Files tab to submit your assignment.

**Week 3 Quiz**··

question

**1**What does it mean when we say that the tails of the

normal curve are asymptotic to the

*x*axis?o

The tails gets closer and closer to the x axis and

eventually touch it.

o

The tails get closer and closer to the x axis and

eventually cross this axis.

o

The tails get

closer and closer to the x axis but never touch it.

o

The tails get closer and closer to the x axis and

eventually become this axis.

question

**2**You work in marketing for a company that

produces work boots. Quality control has sent you a memo detailing the length

of time before the boots wear out under heavy use. They find that the boots

wear out in an average of 208 days, but the exact amount of time varies, following

a normal distribution with a standard deviation of 14 days. For an upcoming ad

campaign, you need to know the percent of the pairs that last longer than six

months-that is, 180 days. Use the empirical rule to approximate this percent.

o

95%

o

2.5%

o

97.5%

o

5%

·

·

question

**3**For any normally distributed random

variable with mean

*μ*and standard deviation*σ*, the percent of the observations thatfall between and is

*closest*to _______.****o

95%

o

16%

o

68%

o

32%

·

·

question

**4**A continuous random variable has the uniform distribution

on the interval [

*a*,*b*] if its probability density function*f*(*x*)___________.

o

is constant for all x between a and b, and 0 otherwise

o

is bell-shaped between a and b

o

is symmetric

around its mean

o

asymptotically approaches the x axis when x increases to

+∞ or decreases to -∞

·

·

·

question

**5**Mutually exclusive and collectively

exhaustive events _______________.

o

do not have to contain all outcomes in a sample space and

may share common outcomes

o

contain all

outcomes in a sample space and do not share common outcomes.

o

contain all outcomes in a sample space and may share

common outcomes

o

do not have to contain all outcomes in a sample space but

do not share common outcomes

·

·

·

·

question

**6**What is probability?

o

Any value between 0 and 1 is always treated as a

probability of an event.

o

A value between 0

and 1 assigned to an event that measures the likelihood of its occurrence.

o

A value between 0 and 1 assigned to an event that

measures the unlikelihood of its occurrence.

o

A numerical value assigned to an event that measures the

number of its occurrences.

·

·

·

question

**7**Which of the following can be represented by a continuous

random variable?

o

The number of arrivals to a drive-thru bank window in a

four-hour period

o

The number of defective light bulbs in a sample of 5

o

The score of a randomly selected student on a

five-question multiple-choice quiz

o

The time of a

flight between Chicago and New York

·

·

·

·

question

**8**Which of the following is correct?

o

A continuous random variable has a probability density

function but not a cumulative distribution function.

o

A continuous

random variable has a probability density function, and a discrete random

variable has a probability mass function.

o

A discrete random variable has a probability mass

function but not a cumulative distribution function.

o

A continuous random variable has a probability mass

function, and a discrete random variable has a probability density function.

·

·

·

question

**9**Which of the following can be represented by a discrete

random variable?

o

The finishing time of participants in a cross-country

meet

o

The number of

obtained spots when rolling a six-sided die

o

The average outside temperature taken every day for two

weeks

o

The height of college students

·

·

·

·

question

**10**The probability that a normal random variable is less

than its mean is ____.

o

Cannot be determined

o

0.0

o

1.0

o

0.5

Week 4 CLO Business Decision Making Project, Part 2

**Use**the same business problem/opportunity and research variable you wrote about in Week 3.**Remember**: Do not actually collect any data; think hypothetically.**Write**a 700- to 1,050-word summary in which you:- Identify the types of descriptive statistics that might be best for summarizing the data, if you were to collect a sample.
- Apply the types of inferential statistics that might be best for analyzing the data, if you were to collect a sample.
- Analyze the role probability or trend analysis might play in helping address the business problem.
- Analyze the role that linear regression for trend analysis might play in helping address the business problem.
- Analyze the role that a time series might play in helping address the business problem.

**Format**your paper consistent with APA guidelines using the template at right.**Click**the Assignment Files tab to submit your assignment.

**Week 4 Quiz**· ·question

**1**For a given set of explanatory variables,

in general:

o

a confidence

interval is narrower than a prediction interval.

o

a confidence interval is wider than a prediction

interval.

o

The width of a confidence interval cannot be determined.

o

the width of a confidence interval is the same as the

width of a prediction interval.

·

question

**2**The standard error of the estimate measures:

o

the variability of

the observed y-values around the predicted y-values.

o

the variability of the predicted y-values around the mean

of the observed y-values.

o

the variability of the values of the sample regression

coefficients.

o

the variability of the explanatory variables.

·

question

**3**In a simple linear regression model, if the plots on a

scatter diagram lie on a straight line, what is the standard error of the

estimate?

o

+1

o

-1

o

Infinity

o

0

·

question

**4**Which of the following variables is not

qualitative?

o

Gender of a person

o

Religious affiliation

o

Student's status (freshman, sophomore, etc.)

o

Number of

dependents claimed on a tax return

·

question

**5**Consider the following simple linear regression

model: The response variable is:

o

β0

o

x

o

y

o

ε

·

·

·

·

question

**6**Another name for an explanatory variable is the

___.

o

descriptive variable

o

independent

variable

o

inferred variable

o

dependent variable

·

·

·

·

·

question

**7**Serial correlation is typically observed in:

o

outliers.

o

sparse data.

o

cross-sectional

data.

o

time series data.

·

question

**8**Consider the following simple linear

regression model:

*β*0 and*β*1 are:o

the unknown

parameters.

o

the random error terms.

o

the response variables.

o

the explanatory variables.

·

question

**9**What is the name of the variable that's

used to predict another variable?

o

Coefficient of Determination

o

Standard Error of the Estimate

o

Response

o

Explanatory

·

question

**10**Which of the following violates the assumptions of

regression analysis?

o

The error term has a constant variance.

o

The error term has a zero mean.

o

The error term is normally distributed.

o

The error term is

correlated with an explanatory variable.

Week 5 CLO Business Decision Making Project, Part 3:

Signature Assignment

**Prepare**an 11- to 15-slide Microsoft® PowerPoint® presentation for the senior management team based on the business problem or opportunity you described in Week 3 and 4. Draw on material you developed in the Week 3 and 4 assignments.**Include**the following in your presentation:- Introduction slide
- Agenda slide
- Describe the organization, with a brief description
- Explain the business problem or opportunity
- Analyze why the business problem is important
- Identify what variable would be best to measure for this problem. Explain why.
- Apply data analysis techniques to this problem (tell which techniques should be used: descriptive stats, inferential stats, probability, linear regression, time series). Explain why.
- Apply a possible solution to the problem/opportunity, with rationale.
- Evaluate how data could be used to measure the implementation of such a solution.
- Conclusion
- References slide (if any source material is quoted or paraphrased throughout the presentation)

**Include**on the slides what you’d want the audience to see (include appropriate visual aids/layout) and include in the Speaker’s Notes section what you’d say as you present each slide. If any source material is quoted or paraphrased in the presentation, use APA citations and references.**Click**the Assignment Files tab to submit your presentation.

**Week 5 Final Examination****Complete**the final examination for Week 5
You'll get 1 file (453.2KB)