QNT 275 Week 5 Practice Set

QNT 275 Week 5 Practice Set

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 QNT 275 Week 5 Practice Set
 

Complete the Week 5 Practice Set problems.

Click the Assignment Files tab to submit your assignment.

Practice Set 5

 

 

Practice Set 5
 

 

 

 

This distribution has only one parameter. The curve is skewed to the right for small df and
 

 

becomes symmetric for large df. The entire distribution curve lies to the right of the vertical

axis. The distribution assumes nonnegative values only

 

 

 

t distribution
 

 

Normal distribution
 

 

Chi-square distribution
 

 

Linear regression.
 

 

 

 

 

 

Find the value of x2 for 12 degrees of freedom and an area of .025 in the right tail of the chi-
 

 

square distribution curve. What is the value of chi-square? Round to three decimal places

 

 

 

 

Determine the value of x2 for 14 degrees of freedom and an area of .10 in the left tail of the
 

 

chi-square distribution curve. What is the value of chi-square? Round to three decimal places

 

 

 

 

Determine the value of x2 for 23 degrees of freedom and an area of .990 in the left tail of the
 

 

chi-square distribution curve. What is the value of chi-square? Round to three decimal places.

 

 

 

 

Α ____________ compares the observed frequencies from a multinomial experiment with
 

 

expected frequencies derived from a certain pattern or theoretical distribution. The test

evaluates how well the observed frequencies fit the expected frequencies.

 

 

 

Goodness-of-fit test
 

 

Chi-square test
 

 

Linear regression
 

 

 

 

 

 

The __________ are the frequencies obtained from the performance of a
 

 

multinomial experiment. The expected frequencies are the frequencies that we expect to obtain

if the null hypothesis is true.

 

 

 

Observed frequencies
 

 

Expected frequencies
 

 

Fluctuating frequencies
 

 

 

 

 

 

The expected frequency of a category is given by Ε = np where n is the sample size and p is the
 

 

probability that an element belongs to that category if the null hypothesis is true. The

________ for a goodness–of–fit test are k – 1, where k denotes the number of possible

outcomes (or categories) for the experiment.

 

 

 

Number of observations
 

 

Degrees of freedom
 

 

Total population
 

 

 

 

 

 

This model includes only two variables, one independent and one dependent, is called a _____1______. The ___2____ is the one being explained, and the ___3___ is the one used to explain the variation in the dependent Select the correct letter that would make the sentence true.
 

 

Select a letter from the list to make this statement true.
 

 

Select a letter from the list to make this statement true.
 

 

Select a letter from the list to make this statement true.
 

 

Linear model
 

 

Qualitative variable
 

 

Multivariate analysis of variance
 

 

Independent variable
 

 

Simple regression model
 

 

One-way Analysis of Variance
 

 

Dependent variable
 

 

Quantitative variable
 

 

 

 

 

 

A population data set produced the following information.
 

 

N=460,  ∑x=3920,   ∑y=2650,  ∑xy=26,570,  ∑x2=48,530

Find the population regression line. Round to three decimal places. Use the format as an example when submitting your equation 456.123 + 789.123x

 

 

 

The following information is obtained from a sample data set.
 

 

n=12,  ∑x=66,  ∑y=588,  ∑xy=2244,  ∑x2=396

Find the estimated regression line Use this format as an example when submitting your equation 123 – 45x
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