Question 1

Which statement is not true concerning the t distribution?

Accepted Answer

A)  Compared to the normal distribution, the t distribution has more area in the tails and less in the center. 
B)  As the number of degrees of freedom increases, the t distribution approaches the normal distribution. 
C)  The t distributions are skewed to the left. 
D)  The population variance is unknown and is estimated by the sample variance s².

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

A test for differences in the means of paired samples is called the paired samples t-test.

Accepted Answer

A) True 
 B)False

Question 4

The critical value of the F distribution depends upon two sets of degrees of freedom-those in the numerator and those in the denominator.

Accepted Answer

A) True 
 B)False

Question 5

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 6

In many marketing research applications,the observations for two groups are not selected from independent samples.Rather,the observations relate to ________ in that the two sets of observations relate to the same respondents.

Accepted Answer

A)  distributed samples 
B)  independent samples 
C)  paired samples 
D)  random samples 
E)  divergent samples

Question 7

According to the text,hypotheses related to differences in population means if the population variance is unknown can be tested using the ________.

Accepted Answer

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

Question 8

Non-parametric tests are hypothesis testing procedures that assume the variables of interest are measured on at least an interval scale.

Accepted Answer

A) True 
 B)False

Exam 17: Hypothesis Testing Related to Differences

Which statement is not true concerning the t distribution?

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

A test for differences in the means of paired samples is called the paired samples t-test.

The critical value of the F distribution depends upon two sets of degrees of freedom-those in the numerator and those in the denominator.

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

In many marketing research applications,the observations for two groups are not selected from independent samples.Rather,the observations relate to ________ in that the two sets of observations relate to the same respondents.

According to the text,hypotheses related to differences in population means if the population variance is unknown can be tested using the ________.

Non-parametric tests are hypothesis testing procedures that assume the variables of interest are measured on at least an interval scale.