Exam 8: Hypothesis Testing: Significance, Effect Size, and Power

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Following the steps to hypothesis testing allows researchers to make decisions about parameters in a sample using statistics measured in a population.

(True/False)

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Question 21

The power of the decision-making process is

(Multiple Choice)

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Question 22

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

(True/False)

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Question 23

The critical values are reported with the test statistic of a one-sample z test using APA format.

(True/False)

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Question 24

A null finding is a decision to retain a null hypothesis that is correct.

(True/False)

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Question 25

A professor gives an exam in which the mean score is 78 points.She gives another exam to test whether or not scores change.In this example,the null hypothesis is

(Multiple Choice)

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Question 26

A researcher reports the following result for a one-sample z test at a .05 level of significance: z = 1.88,p = .06 (d = .25).Is this result significant?

(Multiple Choice)

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Question 27

A researcher computes a test statistic and finds that the p value for this test is .03.What does this result mean?

(Multiple Choice)

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Question 28

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

(True/False)

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Question 29

A method for testing a claim or hypothesis about a parameter in a population,using data measured in a sample,is called

(Multiple Choice)

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Question 30

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

(True/False)

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Question 31

A researcher obtains z = 1.80 for a one-sample z test.What is the decision for this test at a .05 level of significance?

(Multiple Choice)

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Question 32

Which of the following statements regarding the null hypothesis is true?

(Multiple Choice)

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Question 33

The first step to hypothesis testing requires that a researcher

(Multiple Choice)

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Question 34

Increasing sample size will

(Multiple Choice)

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Question 35

The z statistic measures the size of an effect in some population.

(True/False)

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Question 36

A researcher conducts a study,but has low power to detect an effect.Which of the following is one way in which the research can increase power?

(Multiple Choice)

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Question 37

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

(Multiple Choice)

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Question 38

A researcher reports that scores were higher than the mean in the population,z = 1.60,p = .05 (d = .14).If this was a test at a .05 level of significance,then what value must be incorrectly reported?

(Multiple Choice)

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Question 39

As the population standard deviation increases,the power to detect an effect increases.

(True/False)

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Question 40

Showing 21 - 40 of 80

Following the steps to hypothesis testing allows researchers to make decisions about parameters in a sample using statistics measured in a population.

The power of the decision-making process is

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

The critical values are reported with the test statistic of a one-sample z test using APA format.

A null finding is a decision to retain a null hypothesis that is correct.

A professor gives an exam in which the mean score is 78 points.She gives another exam to test whether or not scores change.In this example,the null hypothesis is

A researcher reports the following result for a one-sample z test at a .05 level of significance: z = 1.88,p = .06 (d = .25).Is this result significant?

A researcher computes a test statistic and finds that the p value for this test is .03.What does this result mean?

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

A method for testing a claim or hypothesis about a parameter in a population,using data measured in a sample,is called

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

A researcher obtains z = 1.80 for a one-sample z test.What is the decision for this test at a .05 level of significance?

Which of the following statements regarding the null hypothesis is true?

The first step to hypothesis testing requires that a researcher

Increasing sample size will

The z statistic measures the size of an effect in some population.

A researcher conducts a study,but has low power to detect an effect.Which of the following is one way in which the research can increase power?

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

A researcher reports that scores were higher than the mean in the population,z = 1.60,p = .05 (d = .14).If this was a test at a .05 level of significance,then what value must be incorrectly reported?

As the population standard deviation increases,the power to detect an effect increases.

Introduction to Statistics

Summarizing Data: Frequency Distributions in Tables and Graphs

Summarizing Data: Central Tendency

Summarizing Data: Variability

Probability

Probability, Normal Distributions, and Z Scores

Probability and Sampling Distributions

Testing Means: One-Sample and Two-Independent Sample T Tests

Testing Means: Related Samples T Test

Estimation and Confidence Intervals

Analysis of Variance: One-Way Between-Subjects Design

Analysis of Variance: One-Way Within-Subjects Repeated Measures Design

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

Correlation

Linear Regression and Multiple Regression

Nonparametric Tests: Chi-Square Tests

Nonparametric Tests: Tests for Ordinal Data

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