Question 1

The critical value of the statistic _________.

Accepted Answer

A)  is independent of alpha 
B)  is equal to alpha 
C)  is always the same in the z distribution 
D)  depends on alpha

Question 2

The Null Hypothesis Population is an actual or theoretical set of population scores that would result if _________.

Accepted Answer

A)  the experiment were done on the entire population and the independent variable had no effect 
B)  the experiment were done on the sample and the independent variable had no effect 
C)  the experiment were done on the entire population and the independent variable had a real effect 
D)  the subjects in the population believed the null hypothesis was true

Question 3

To use the z test, µ and s must be specified.

Accepted Answer

A) True 
 B)False

Question 4

The z test is used to test whether or not it is reasonable to assume a sample of size N was likely to have been drawn from a population with known parameters µ and s .

Accepted Answer

A) True 
 B)False

Question 5

We can reject H 0 if _________.

Accepted Answer

A)  z obt = z crit 
B)  z obt ≥ z crit 
C)  z obt ≤ z crit 
D)  | z obt | ≥ | z crit |

Question 6

Only one sampling distribution can apply to any given problem or experiment.

Accepted Answer

A) True 
 B)False

Question 7

The normal deviate test is used with _________.

Accepted Answer

A)  a replicated measures design 
B)  an independent groups design 
C)  a single sample design 
D)  a multi-group design

Question 8

For sampling distribution of the mean,  =  .

Accepted Answer

A) True 
 B)False

Question 9

What we are testing with the z test in this chapter is _________.

Accepted Answer

A)  the sample mean 
B)  the population mean 
C)  the sample error 
D)  the standard error

Question 10

Define critical values of  .

Accepted Answer

The answer of Define critical values of  ....

Question 11

Which of the following statements is(are) false?

Accepted Answer

A)  The sampling distribution of a statistic gives (1) all the values that the statistic can take and (2) the probability of getting each value if sampling is random from the null hypothesis population. 
B)  The sampling distribution of a statistic gives (1) all the values that the statistic can take and (2) the probability of getting each value under the assumption that it resulted from chance alone. 
C)  The critical region for rejection of the null hypothesis is 1 - (the area under the curve that contains all the values of the statistic that allow rejection of the null hypothesis). 
D)  They are all true.

Question 12

Sampling distributions can be obtained empirically by _________.

Accepted Answer

A)  determining all possible samples of size N that can be formed from the Null Hypothesis Population 
B)  calculating the statistic for each of the samples 
C)  calculating the probability of getting each value of the statistic, if chance alone is operating 
D)  selecting several samples from all possible samples and calculating the statistic for those samples 
E)  a, b and c

Question 13

Define null-hypothesis population.

Accepted Answer

The answer of Define null-hypothesis population....

Question 14

An English teacher has been teaching a sixth grade composition class for many years. He has the feeling that over the past several years, the writing ability of students has changed. A national test of proficiency in composition was administered 5 years ago. The resulting distribution of scores was normally shaped, had a mean of 85 and a standard deviation of 10.9. In order to test his feeling, he gives his present class of 43 students the same proficiency test. The resulting mean is 80 and the standard deviation is 8.7. Using the z test with a = 0.05 2 tail , the appropriate critical value is _________.

Accepted Answer

A)  z crit = - 1.645 
B)  z crit = ±1.96 
C)  z crit = - 1.96 
D)  z crit = ± 1.645

Question 15

To use the normal deviate one must know the population parameters of the Null Hypothesis Population.

Accepted Answer

A) True 
 B)False

Question 16

High power is desirable in an experiment.

Accepted Answer

A) True 
 B)False

Question 17

The sampling distribution of z varies with the size of the sample.

Accepted Answer

A) True 
 B)False

Question 18

A raw score distribution that is negatively skewed will produce a sampling distribution of the mean for N = 4 which is _________.

Accepted Answer

A)  also negatively skewed 
B)  normally distributed 
C)  positively skewed 
D)  cannot be determined

Question 19

Referring to question 29,how high must N be to be able to detect a µ real = 53 with a power of 0.8000?

Accepted Answer

A)  158 
B)  222 
C)  173 
D)  248

Question 20

A sampling distribution gives all the values a statistic can take, along with _________.

Accepted Answer

A)  the probability of getting each value if sampling is random from the Null Hypothesis Population 
B)  the probability of getting each value under the assumption that it had resulted due to chance alone 
C)  the number of samples in the distribution 
D)  the probability of getting each value if sampling is random from the Null Hypothesis Population and the probability of getting each value under the assumption that it had resulted due to chance alone

Exam 12: Sampling Distributions, Sampling Distribution of the Mean: the Normal Deviate Z Test

The critical value of the statistic _________.

The Null Hypothesis Population is an actual or theoretical set of population scores that would result if _________.

To use the z test, µ and s must be specified.

The z test is used to test whether or not it is reasonable to assume a sample of size N was likely to have been drawn from a population with known parameters µ and s .

We can reject H 0 if _________.

Only one sampling distribution can apply to any given problem or experiment.

The normal deviate test is used with _________.

For sampling distribution of the mean, = .

What we are testing with the z test in this chapter is _________.

Define critical values of .

Which of the following statements is(are) false?

Sampling distributions can be obtained empirically by _________.

Define null-hypothesis population.

To use the normal deviate one must know the population parameters of the Null Hypothesis Population.

High power is desirable in an experiment.

The sampling distribution of z varies with the size of the sample.

A raw score distribution that is negatively skewed will produce a sampling distribution of the mean for N = 4 which is _________.

Referring to question 29,how high must N be to be able to detect a µ real = 53 with a power of 0.8000?

A sampling distribution gives all the values a statistic can take, along with _________.