Question 1

The null hypothesis can be rejected if the alpha value is less than or equal to .05.

Accepted Answer

A) True 
 B)False

Question 2

A type 2 error occurs when we falsely reject the null hypothesis when it is actually false.

Accepted Answer

A) True 
 B)False

Question 3

Parametric statistical tests assume that the level of measurement is at least an interval scale.

Accepted Answer

A) True 
 B)False

Question 4

In a factorial ANOVA with repeated measures,error variance for the F ratios is estimated by the interaction of subjects within treatments.

Accepted Answer

A) True 
 B)False

Question 5

The standard deviation is:

Accepted Answer

A)  the square of the variance 
B)  larger than the mean 
C)  the  variance 
D)  a measure of dispersion

Question 6

Which of the following is the most useful descriptive measure of dispersion?

Accepted Answer

A)  range 
B)  variance 
C)  mean deviation 
D)  standard deviation 
E)  absolute deviation

Question 7

In a normal distribution,the mean,median,and mode have the same value.

Accepted Answer

A) True 
 B)False

Question 8

The ____ is the sum of all scores divided by the number of scores.

Accepted Answer

A)  median 
B)  mean 
C)  mode 
D)  deviation 
E)  average

Question 9

A sample is a subset of the population.

Accepted Answer

A) True 
 B)False

Question 10

As the size of a sample increases,the ____ of the distribution of sample means becomes ____.

Accepted Answer

A)  mean; larger 
B)  mean; smaller 
C)  standard deviation; larger 
D)  standard deviation; smaller

Question 11

The power of a statistical test determines how likely it is that the null hypothesis will be rejected.

Accepted Answer

A) True 
 B)False

Question 12

If an obtained score has a z-value of two or greater,then this score is greater than about 95% of all scores.

Accepted Answer

A) True 
 B)False

Question 13

A sample is to a population as a ____ is to a(n)____.

Accepted Answer

A)  description; inference 
B)  statistic; inference 
C)  fact; datum 
D)  mean; standard deviation 
E)  statistic; parameter

Question 14

In a histogram,frequency of scores is on the abscissa.

Accepted Answer

A) True 
 B)False

Question 15

The mode is:

Accepted Answer

A)  the arithmetic average 
B)  the middle score 
C)  the most frequent score 
D)  the least frequent score 
E)  the standard score

Question 16

In a 2 $\times$ 2 factorial ANOVA,there are four F ratios that are of importance.

Accepted Answer

A) True 
 B)False

Question 17

If the mean score is 200 and the standard deviation is 50,then a score of 50 is one standard deviation below the mean.

Accepted Answer

A) True 
 B)False

Question 18

Statistical tests that increase type 1 errors tend to decrease type 2 errors.

Accepted Answer

A) True 
 B)False

Question 19

Statistically significant effects can vary in their strength,which is measured by:

Accepted Answer

A)  the alpha level 
B)  probability,such as p 
C)  the t-test 
D)  the magnitude of effect 
E)  the probability of a type-I error

Question 20

The within-subjects t-test is used for the same kind of experimental design that the Wilcoxon test is used.

Accepted Answer

A) True 
 B)False

Exam 15: Appendices a and B Descriptive and Inferential Statistics

The null hypothesis can be rejected if the alpha value is less than or equal to .05.

A type 2 error occurs when we falsely reject the null hypothesis when it is actually false.

Parametric statistical tests assume that the level of measurement is at least an interval scale.

In a factorial ANOVA with repeated measures,error variance for the F ratios is estimated by the interaction of subjects within treatments.

The standard deviation is:

Which of the following is the most useful descriptive measure of dispersion?

In a normal distribution,the mean,median,and mode have the same value.

The ____ is the sum of all scores divided by the number of scores.

A sample is a subset of the population.

As the size of a sample increases,the of the distribution of sample means becomes .

The power of a statistical test determines how likely it is that the null hypothesis will be rejected.

If an obtained score has a z-value of two or greater,then this score is greater than about 95% of all scores.

A sample is to a population as a is to a(n) .

In a histogram,frequency of scores is on the abscissa.

The mode is:

In a 2 $\times$ 2 factorial ANOVA,there are four F ratios that are of importance.

If the mean score is 200 and the standard deviation is 50,then a score of 50 is one standard deviation below the mean.

Statistical tests that increase type 1 errors tend to decrease type 2 errors.

Statistically significant effects can vary in their strength,which is measured by:

The within-subjects t-test is used for the same kind of experimental design that the Wilcoxon test is used.

Exam 15: Appendices a and B Descriptive and Inferential Statistics

The null hypothesis can be rejected if the alpha value is less than or equal to .05.

A type 2 error occurs when we falsely reject the null hypothesis when it is actually false.

Parametric statistical tests assume that the level of measurement is at least an interval scale.

In a factorial ANOVA with repeated measures,error variance for the F ratios is estimated by the interaction of subjects within treatments.

The standard deviation is:

Which of the following is the most useful descriptive measure of dispersion?

In a normal distribution,the mean,median,and mode have the same value.

The ____ is the sum of all scores divided by the number of scores.

A sample is a subset of the population.

As the size of a sample increases,the ____ of the distribution of sample means becomes ____.

The power of a statistical test determines how likely it is that the null hypothesis will be rejected.

If an obtained score has a z-value of two or greater,then this score is greater than about 95% of all scores.

A sample is to a population as a ____ is to a(n) ____.

In a histogram,frequency of scores is on the abscissa.

The mode is:

In a 2 ×\times× 2 factorial ANOVA,there are four F ratios that are of importance.

If the mean score is 200 and the standard deviation is 50,then a score of 50 is one standard deviation below the mean.

Statistical tests that increase type 1 errors tend to decrease type 2 errors.

Statistically significant effects can vary in their strength,which is measured by:

The within-subjects t-test is used for the same kind of experimental design that the Wilcoxon test is used.

As the size of a sample increases,the of the distribution of sample means becomes .

A sample is to a population as a is to a(n) .

In a 2 $\times$ 2 factorial ANOVA,there are four F ratios that are of importance.