Question 1

Which of the following statistics indicates the degree to which the variation in one variable, X, is related to the variation in another variable, Y?

Accepted Answer

A) covariance correlation 
B) inverse correlation 
C) product moment correlation 
D) multiple regression 
E) F-statistic

Question 2

In a short essay, list at least three statements that exhibit a single variable against a known or given standard.

Accepted Answer

The answer of In a short essay, list at least...

Question 3

The term used to denote the standardized regression coefficient is called the alpha coefficient.

Accepted Answer

A) True 
 B)False

Question 4

According to the text, samples drawn randomly from different populations are termed ________.

Accepted Answer

A) dependent samples 
B) parallel samples 
C) exclusive samples 
D) independent samples 
E) divergent samples

Question 5

The ________ is computed as the ratio of two sample variances.

Accepted Answer

A) F statistic 
B) p statistic 
C) t statistic 
D) z statistic 
E) chi-square statistic

Question 6

The two sets of degrees of freedom in which the F distribution depends on are the degrees of freedom in the ________ and the degrees of freedom in the ________.

Accepted Answer

A) sample; questionnaire 
B) numerator; denominator 
C) variance; standard deviation 
D) t-test; F-test 
E) matrix; contingency table

Question 7

Standardization may be desirable because it is easier to compare the beta coefficients than it is to compare the raw coefficients.

Accepted Answer

A) True 
 B)False

Question 8

According to the text, the t distribution is similar to the ________ in appearance.

Accepted Answer

A) parallel distribution 
B) normal distribution 
C) vertical distribution 
D) horizontal distribution 
E) chi-square distribution

Question 9

In multiple regression, the strength of association is measured by the square of the multiple correlation coefficient, which is called the coefficient of multiple determination.

Accepted Answer

A) True 
 B)False

Question 10

A z-test is a hypothesis test using the standard normal distribution.

Accepted Answer

A) True 
 B)False

Question 11

Two samples that are not experimentally related are called dependent samples.

Accepted Answer

A) True 
 B)False

Question 12

The most popular parametric test is the t-test conducted for examining hypotheses about means.

Accepted Answer

A) True 
 B)False

Question 13

In the case of conducting the t-test on the means of two samples of observations, the samples can be independent or paired.

Accepted Answer

A) True 
 B)False

Question 14

A(n)________ is commonly used for the purpose of providing inferences for making statements about the means of parent populations.

Accepted Answer

A) F-test 
B) p-test 
C) t-test 
D) z-test 
E) chi-square test

Question 15

The ________ is a symmetric bell-shaped distribution that is useful for small sample testing.

Accepted Answer

A) F distribution 
B) p distribution 
C) t distribution 
D) z distribution 
E) chi-square distribution

Question 16

In advertising testing, attitude toward the brand was measured for respondents of a sample before and after seeing an ad for a brand.A one-sample t-test would then be used to evaluate whether the ad had any effect on attitude toward the ad.

Accepted Answer

A) True 
 B)False

Question 17

The strength of association is measured by the ________.

Accepted Answer

A) coefficient of determination 
B) regression equation 
C) correlation coefficient 
D) F factor 
E) F-statistic

Question 18

The t statistic is calculated by assuming that all of the following exists EXCEPT that the ________.

Accepted Answer

A) variable is normally distributed 
B) mean is known 
C) population variance is estimated from the sample 
D) sample size is large 
E) All are assumptions used with the t statistic.

Question 19

Which of the following is the first step in hypothesis testing based on the t statistic?

Accepted Answer

A) Select the appropriate formula for the t statistic. 
B) Take one or two samples and compute the mean. 
C) Select a significance level α for testing. 
D) Refer to statistical tables. 
E) Formulate the null (H0)and the alternative (H1)hypotheses.

Question 20

A frequency distribution that depends on two sets of degrees of freedom is called an F distribution.

Accepted Answer

A) True 
 B)False

Exam 12: Data Analysis: Hypothesis Testing Related to Differences, Correlation, and Regression

Which of the following statistics indicates the degree to which the variation in one variable, X, is related to the variation in another variable, Y?

In a short essay, list at least three statements that exhibit a single variable against a known or given standard.

The term used to denote the standardized regression coefficient is called the alpha coefficient.

According to the text, samples drawn randomly from different populations are termed ________.

The ________ is computed as the ratio of two sample variances.

The two sets of degrees of freedom in which the F distribution depends on are the degrees of freedom in the and the degrees of freedom in the .

Standardization may be desirable because it is easier to compare the beta coefficients than it is to compare the raw coefficients.

According to the text, the t distribution is similar to the ________ in appearance.

In multiple regression, the strength of association is measured by the square of the multiple correlation coefficient, which is called the coefficient of multiple determination.

A z-test is a hypothesis test using the standard normal distribution.

Two samples that are not experimentally related are called dependent samples.

The most popular parametric test is the t-test conducted for examining hypotheses about means.

In the case of conducting the t-test on the means of two samples of observations, the samples can be independent or paired.

A(n) ________ is commonly used for the purpose of providing inferences for making statements about the means of parent populations.

The ________ is a symmetric bell-shaped distribution that is useful for small sample testing.

In advertising testing, attitude toward the brand was measured for respondents of a sample before and after seeing an ad for a brand.A one-sample t-test would then be used to evaluate whether the ad had any effect on attitude toward the ad.

The strength of association is measured by the ________.

The t statistic is calculated by assuming that all of the following exists EXCEPT that the ________.

Which of the following is the first step in hypothesis testing based on the t statistic?

A frequency distribution that depends on two sets of degrees of freedom is called an F distribution.