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

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.

(True/False)

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Question 41

Suppose a researcher wants to make sure that the probability of committing a Type I error is less than 5%.How can the researcher control for this?

(Multiple Choice)

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Question 42

The value of power is influenced by the alpha level,sample size,and effect size.

(True/False)

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Question 43

A researcher computes a z statistic and obtains z = 2.10.If this were a one-tailed (lower-tail critical)test,then the decision would be to reject the null hypothesis.

(True/False)

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Question 44

What is the typical level of significance for a hypothesis test in behavioral research?

(Multiple Choice)

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Question 45

The one-sample z test is a hypothesis test used to test hypotheses

(Multiple Choice)

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Question 46

The probability of correctly rejecting a false null hypothesis is called the power of the decision-making process.

(True/False)

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Question 47

If a researcher obtains a null finding,then what is the decision?

(Multiple Choice)

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Question 48

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

(True/False)

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Question 49

In hypothesis testing,a researcher's decision

(Multiple Choice)

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Question 50

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?

(Multiple Choice)

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Question 51

The z statistic is a z transformation for a distribution of sample means.

(True/False)

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Question 52

When a researcher decides to retain the null hypothesis because the rejection region was located in the wrong tail,this is called a

(Multiple Choice)

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Question 53

A researcher reports that the standard deviation in Population A is = 2.3 and the standard deviation in Population B is = 4.3.Which population is associated with the highest power to detect an effect?

(Multiple Choice)

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Question 54

A null finding is one in which the null hypothesis is incorrectly rejected.

(True/False)

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Question 55

Which of the following best describes the p value.

(Multiple Choice)

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Question 56

A researcher obtains z = 2.04 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 57

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?

(Multiple Choice)

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Question 58

Based on the effect size conventions,d = 0.18 is a

(Multiple Choice)

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Question 59

Is a one-sample z test reported differently for one-tailed and two-tailed tests?

(Multiple Choice)

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Question 60

Showing 41 - 60 of 80

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.

Suppose a researcher wants to make sure that the probability of committing a Type I error is less than 5%.How can the researcher control for this?

The value of power is influenced by the alpha level,sample size,and effect size.

A researcher computes a z statistic and obtains z = 2.10.If this were a one-tailed (lower-tail critical)test,then the decision would be to reject the null hypothesis.

What is the typical level of significance for a hypothesis test in behavioral research?

The one-sample z test is a hypothesis test used to test hypotheses

The probability of correctly rejecting a false null hypothesis is called the power of the decision-making process.

If a researcher obtains a null finding,then what is the decision?

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

In hypothesis testing,a researcher's decision

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?

The z statistic is a z transformation for a distribution of sample means.

When a researcher decides to retain the null hypothesis because the rejection region was located in the wrong tail,this is called a

A researcher reports that the standard deviation in Population A is = 2.3 and the standard deviation in Population B is = 4.3.Which population is associated with the highest power to detect an effect?

A null finding is one in which the null hypothesis is incorrectly rejected.

Which of the following best describes the p value.

A researcher obtains z = 2.04 for a one-sample z test.What is the decision for this test at a .05 level of significance?

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?

Based on the effect size conventions,d = 0.18 is a

Is a one-sample z test reported differently for one-tailed and two-tailed tests?

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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