QNT 275 Week 1 Practice Set

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QNT 275 Week 1 Practice Set

Chapter 01, Section 1.3, Problem 008a

 

     Correct.

      

Indicate if the following variable is quantitative or qualitative.

 

The amount of time a student spent studying for an exam is a

 

 variable.

 

 

 

 

Chapter 01, Supplementary Exercises, Problem 043a

 

     Correct.

      

State whether the following is an example of sampling with replacement or without replacement.

 

Selecting 60 patients out of 100 to test a new drug is sampling

 

 replacement.

 

 

 

 

8th-ed Chapter 01, Section 1.2, Problem 006a

 

     Correct.

      

Explain whether the following constitutes a population or a sample.

 

Opinions on a certain issue obtained from all adults living in a city constitute a

 

.

 

 

 

8th-ed Chapter 01, Section 1.3, Problem 009

The following table gives the number of dog bites reported to the police last year in six cities.

 

City      Number of Bites

Center City 19

Elm Grove  38

Franklin      36

Bay City     33

Oakdale 38

Sand Point  53

 

With reference to this table, what is 38?

 

 

a measurement

 

a data set

 

a member

 

a variable

 

 

 

 

 

8th-ed Chapter 01, Section 1.3, Problem 011

 

     Correct.

      

The following table gives the number of dog bites reported to the police last year in six cities.

City      Number of Bites

Center City 46

Elm Grove  30

Franklin      51

Bay City     41

Oakdale 11

Sand Point  5

a. What is the variable for this data set?

 

The variable for this data set is the

 

.

b. How many observations are in this data set?

 

There is/are    observation(s) in this data set.

c. How many elements does this data set contain?

 

There is/are    element(s) in this data set.

 

 

 

 

 

8th-ed Chapter 01, Section 1.4, Problem 017

 

     Correct.

      

Classify the following quantitative variable as discrete or continuous.

 

The amount of gasoline put into a car at a gas station is a

 

 variable.

 

 

 

 

 

 

8th-ed Chapter 01, Section 1.6, Problem 021a

 

     Correct.

      

Classify the following as cross-section or time-series data.

 

The average prices of houses in 500 cities is

 

 data.

 

 

 

 

8th-ed Chapter 01, Section 1.7, Problem 023a

 

     Correct.

      

The following table lists six pairs of m and f values.

m   5    4    23   11   11   19

f     15   10   16   7    3    13

Calculate the value of the following: ∑f= 

exact number, no tolerance

 

 

 

 

 

 

 

8th-ed Chapter 01, Section 1.7, Problem 028a

 

     Correct.

      

Nine randomly selected customers at a local fast-food restaurant ordered meals having the following calorie counts: 975, 520, 1560, 872, 1025, 431, 361, 502, and 1118. Let y denote the calorie content of a meal ordered at this restaurant. Find the following sum.

 ∑y= 

exact number, no tolerance
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