Question 1

In hypothesis testing,a researcher's decision

Accepted Answer

A) is based on a probability 
B) depends on the level of significance for a hypothesis test 
C) can be to retain or reject the null hypothesis 
D) all of the above 
A) is based on a probability 
B) depends on the level of significance for a hypothesis test 
C) can be to retain or reject the null hypothesis 
D) all of the above

Question 2

One step to hypothesis testing is to set the criteria for a decision.

Accepted Answer

A) True 
 B)False

Question 3

In hypothesis testing,a researcher can never

Accepted Answer

A) compute a test statistic before making a decision 
B) make decisions about the null hypothesis 
C) prove that his or her hypothesis is correct 
D) know the likelihood of obtaining a sample mean if the null hypothesis were true 
A) compute a test statistic before making a decision 
B) make decisions about the null hypothesis 
C) prove that his or her hypothesis is correct 
D) know the likelihood of obtaining a sample mean if the null hypothesis were true

Question 4

A researcher obtains z = 3.98 for a one-sample z test.If her decision is to retain the null hypothesis,then what do you know about her decision?

Accepted Answer

A) Her decision was inconclusive. 
B) Her decision was based on a two-tailed test. 
C) Her decision resulted in a Type III error. 
D) both A and B 
A) Her decision was inconclusive. 
B) Her decision was based on a two-tailed test. 
C) Her decision resulted in a Type III error. 
D) both A and B

Question 5

The p value is reported with the test statistic of a one-sample z test using APA format.

Accepted Answer

A) True 
 B)False

Question 6

The greater the power,the less likely we are to correctly reject the null hypothesis,if it is incorrect.

Accepted Answer

A) True 
 B)False

Question 7

One-tailed tests will rarely,if ever,result in decisions that are different from two-tailed tests in hypothesis testing.

Accepted Answer

A) True 
 B)False

Question 8

When reporting the results of a one-sample z test using APA format,the ________ does not need to be reported.

Accepted Answer

A) Test statistic 
B) p value 
C) effect size 
D) critical values 
A) Test statistic 
B) p value 
C) effect size 
D) critical values

Question 9

Which of the following best describes the p value.

Accepted Answer

A) It is the same as an alpha level 
B) It is a conditional probability 
C) Its value must be greater than .05 to reject the null hypothesis 
D) all of the above 
A) It is the same as an alpha level 
B) It is a conditional probability 
C) Its value must be greater than .05 to reject the null hypothesis 
D) all of the above

Question 10

As sample size increases,the power to detect an effect increases.

Accepted Answer

A) True 
 B)False

Question 11

Given the following values:   = 10,M = 8,   = 0.5,conduct a one-sample z test at a .05 level of significance.What is the decision for a two-tailed test?

Accepted Answer

A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) There is not enough information since the sample size is not given. 
A) to reject the null hypothesis 
B) to retain the null hypothesis 
C) There is not enough information since the sample size is not given.

Question 12

The probability of committing a Type I error is stated by ________;the probability for committing a Type II error is stated by ________.

Accepted Answer

A) beta;alpha 
B) alpha;beta 
C) a p value;a p value 
D) the power;the power 
A) beta;alpha 
B) alpha;beta 
C) a p value;a p value 
D) the power;the power

Question 13

An effect size of d = 0.68 is a large effect in the population.

Accepted Answer

A) True 
 B)False

Question 14

As effect size increases,the power to detect an effect decreases.

Accepted Answer

A) True 
 B)False

Question 15

The typical level of significance in hypothesis testing in the behavioral sciences is set at .05.

Accepted Answer

A) True 
 B)False

Question 16

A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and standard deviation of 12.She determines that the mean IQ in this sample is 104.Assuming she computes a one-sample z test at a .05 level of significance,what is the decision for a two-tailed test?

Accepted Answer

A) Retain the null hypothesis;IQ scores in this sample are the same as those in the population. 
B) Reject the null hypothesis;IQ scores in this sample are significantly higher than those in the population. 
C) There is not enough information to make a decision. 
A) Retain the null hypothesis;IQ scores in this sample are the same as those in the population. 
B) Reject the null hypothesis;IQ scores in this sample are significantly higher than those in the population. 
C) There is not enough information to make a decision.

Question 17

For the one-sample z test,the larger the value of a test statistic,the less likely it is that differences observed in the study are due to error.

Accepted Answer

A) True 
 B)False

Question 18

Cohen's d is a measure of how far mean scores have shifted in a population.

Accepted Answer

A) True 
 B)False

Question 19

A researcher directly controls for the probability of a ________,but does not directly control for the probability of a ________.

Accepted Answer

A) Type I error;alpha level 
B) Type II error;beta level 
C) Type I error;Type II error 
D) Type II error;Type I error 
A) Type I error;alpha level 
B) Type II error;beta level 
C) Type I error;Type II error 
D) Type II error;Type I error

Question 20

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Accepted Answer

A) True 
 B)False

In hypothesis testing,a researcher's decision

One step to hypothesis testing is to set the criteria for a decision.

In hypothesis testing,a researcher can never

A researcher obtains z = 3.98 for a one-sample z test.If her decision is to retain the null hypothesis,then what do you know about her decision?

The p value is reported with the test statistic of a one-sample z test using APA format.

The greater the power,the less likely we are to correctly reject the null hypothesis,if it is incorrect.

One-tailed tests will rarely,if ever,result in decisions that are different from two-tailed tests in hypothesis testing.

When reporting the results of a one-sample z test using APA format,the ________ does not need to be reported.

Which of the following best describes the p value.

As sample size increases,the power to detect an effect increases.

Given the following values: = 10,M = 8, = 0.5,conduct a one-sample z test at a .05 level of significance.What is the decision for a two-tailed test?

The probability of committing a Type I error is stated by ;the probability for committing a Type II error is stated by .

An effect size of d = 0.68 is a large effect in the population.

As effect size increases,the power to detect an effect decreases.

The typical level of significance in hypothesis testing in the behavioral sciences is set at .05.

A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and standard deviation of 12.She determines that the mean IQ in this sample is 104.Assuming she computes a one-sample z test at a .05 level of significance,what is the decision for a two-tailed test?

For the one-sample z test,the larger the value of a test statistic,the less likely it is that differences observed in the study are due to error.

Cohen's d is a measure of how far mean scores have shifted in a population.

A researcher directly controls for the probability of a ,but does not directly control for the probability of a .

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

Two-Way Analysis of Variance: Between-Subjects Factorial Design

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

Exam 8: Testing Means: One-Sample T Test With Confidence Intervals

In hypothesis testing,a researcher's decision

One step to hypothesis testing is to set the criteria for a decision.

In hypothesis testing,a researcher can never

A researcher obtains z = 3.98 for a one-sample z test.If her decision is to retain the null hypothesis,then what do you know about her decision?

The p value is reported with the test statistic of a one-sample z test using APA format.

The greater the power,the less likely we are to correctly reject the null hypothesis,if it is incorrect.

One-tailed tests will rarely,if ever,result in decisions that are different from two-tailed tests in hypothesis testing.

When reporting the results of a one-sample z test using APA format,the ________ does not need to be reported.

Which of the following best describes the p value.

As sample size increases,the power to detect an effect increases.

Given the following values: = 10,M = 8, = 0.5,conduct a one-sample z test at a .05 level of significance.What is the decision for a two-tailed test?

The probability of committing a Type I error is stated by ________;the probability for committing a Type II error is stated by ________.

An effect size of d = 0.68 is a large effect in the population.

As effect size increases,the power to detect an effect decreases.

The typical level of significance in hypothesis testing in the behavioral sciences is set at .05.

A researcher selects a sample of 36 students from a school population with a mean IQ of 100 and standard deviation of 12.She determines that the mean IQ in this sample is 104.Assuming she computes a one-sample z test at a .05 level of significance,what is the decision for a two-tailed test?

For the one-sample z test,the larger the value of a test statistic,the less likely it is that differences observed in the study are due to error.

Cohen's d is a measure of how far mean scores have shifted in a population.

A researcher directly controls for the probability of a ________,but does not directly control for the probability of a ________.

Assuming that the rejection region is placed in the correct tail,the power of detecting an effect is larger for one-tailed tests compared with two-tailed tests.

Introduction to Statistics

Summarizing Data: Frequency Distributions in

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability, Normal Distributions, and Z Scores

Characteristics of the Sample Mean

Hypothesis Testing: Significance, Effect Size, and Power

Testing Means: Two- Independent-Sample T Test With Confidence Intervals

Testing Means: Related-Samples T Test With Confidence Intervals

One-Way Analysis of Variance: Between- Subjects and Within- Subjects Repeated- Measures Designs

Two-Way Analysis of Variance: Between-Subjects Factorial Design

Correlation and Linear Regression

Chi-Square Tests: Goodness of Fit and the Test for Independence

Nonparametric Tests for Ordinal Data: Understanding and Interpretation

Chi-Square Tests: Goodness-of-Fit and Independence

Understanding Regression Analysis

Understanding Correlation Coefficients in Statistical Analysis

Filters

The probability of committing a Type I error is stated by ;the probability for committing a Type II error is stated by .

A researcher directly controls for the probability of a ,but does not directly control for the probability of a .