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Practice Set 5

 

Practice Set 5

 

 

1. 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

A. t distribution

B. Normal distribution

C. Chi-square distribution

D. Linear regression.

 

2. 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

 

3. 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

 

4. 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.

 

5. 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.

A. Goodness-of-fit test

B. Chi-square test

C. Linear regression

 

6. 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.

A. Observed frequencies

B. Expected frequencies

C. Fluctuating frequencies

 

7. 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.

A. Number of observations

B. Degrees of freedom

C. Total population

 

8. 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 variable. Select the correct letter that would make the sentence true.

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

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

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

A. Linear model

B. Qualitative variable

C. Multivariate analysis of variance

D. Independent variable

E. Simple regression model

F. One-way Analysis of Variance

G. Dependent variable

H. Quantitative variable

 

9. 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

10. 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

 

 

Copyright © XXXX by University of Phoenix. All rights reserved.

Copyright © 2017 by University of Phoenix. All rights reserved.

 

Practice Set 5

 

QNT/275 Version 6

 

1

 

 

Copyright ©

 

2017

 

by University of Phoenix

. All rights reserved.

 

University of Phoenix Material

 

 

 

 

Practice S

et 5

 

 

Practice Set

 

5

 

 

 

1. 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

 

A.

 

t distribution

 

B.

 

Normal distribution

 

C.

 

Chi

–

square distribution

 

D.

 

Linear regression.

 

 

2. 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

 

 

3. 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

 

 

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

 

 

chi

–

square distribution c

urve. What is the value of chi

–

square? Round to three decimal

places.

 

 

5. Á ____________ compares the observed frequencies from a multinomial experiment with

 

 

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

t

 

 

evaluates how well the observed frequencies fit the expected frequencies.

 

A.

 

Goodness

–

of

–

fit test

 

B.

 

Chi

–

square test

 

C.

 

Linear regression

 

 

6. The __________ are the frequencies obtained from the performance of a

 

 

multinomial experiment. The e

xpected frequencies are the frequencies that we expect to

obtain

 

 

if the null hypothesis is true.

 

A.

 

Observed frequencies

 

B.

 

Expected frequencies

 

C.

 

Fluctuating frequencies

 

 

7. The expected frequency of a category is given by Å = 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 a

re k

–

 

1, where k denotes the number of possible

 

Practice Set 5

QNT/275 Version 6

1

 

Copyright © 2017 by University of Phoenix. All rights reserved.

University of Phoenix Material

 

Practice Set 5

 

Practice Set 5

 

 

1. 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

A. t distribution

B. Normal distribution

C. Chi-square distribution

D. Linear regression.

 

2. 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

 

3. 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

 

4. 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.

 

5. 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.

A. Goodness-of-fit test

B. Chi-square test

C. Linear regression

 

6. 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.

A. Observed frequencies

B. Expected frequencies

C. Fluctuating frequencies

 

7. 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