Exam 4: Introduction to Hypothesis Testing

If a counseling psychologist wants to know if doubling the number of counseling sessions attended by students experiencing severe test anxiety will reduce or increase the amount of anxiety the students report just before a test,the statistical test the psychologist would use would be

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Question 41

If Population 2 refers to people in general,Population 1 refers to __________.

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Question 42

Rejecting the null hypothesis at the .05 level means that

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Question 43

A research hypothesis that does not predict a particular direction of difference between populations is called a(n)__________ hypothesis.

(Short Answer)

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Question 44

When the results of a study are not extreme enough to reject the null hypothesis,a psychologist can conclude with reasonable confidence that

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Question 45

A popular music magazine has speculated that the average length of a song on one of today's popular CDs is 3.75 minutes with a standard deviation of 0.75 minutes.A randomly selected song of a particular new type of music is 5 minutes.Using the .05 level of significance,is this new type of music,represented by this one song,longer than popular songs in general? a.Use the five steps of hypothesis testing. b.Sketch the distributions involved. c.Explain the logic of what you did to a person who is familiar with graphs of distributions,the mean,standard deviation,Z scores,the normal curve and normal curve tables,and the basics of probability,but knows nothing else about statistics.Be sure your explanation includes the overall logic of hypothesis testing including each of the five steps.

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Question 46

A psychologist who rejects the null hypothesis-because the probability of obtaining the results if the null hypothesis is true is less than 5%-would express this finding in symbols as

(Multiple Choice)

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Question 47

The distribution that represents the situation in which the null hypothesis is true is

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Question 48

A two-tailed test is associated with

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Question 49

For a nondirectional research hypothesis,the null hypothesis is expressed in symbols as __________.

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Question 50

If a health psychologist wants to know if regular exercise improves people's health,the type of hypothesis the psychologist would use is

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Question 51

A psychologist who states the hypothesis that there will be no difference between a new approach to therapy and the standard approach is stating a

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Question 52

The region of the comparison distribution in which the null hypothesis will be rejected is all on one side of the distribution for a(n)__________.

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Question 53

When the null hypothesis is rejected,the results of a study are said to be __________.

(Short Answer)

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Question 54

The conventional levels of significance in hypothesis testing in psychology are

(Multiple Choice)

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Question 55

If you set alpha to .001 and are conducting a one-tailed test,what value do you need to look up in the normal curve table to determine the cutoff Z score on the comparison distribution?

(Multiple Choice)

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Question 56

A health psychologist is interested in the effectiveness of a new exercise on reducing the rate of heart attacks because the exercise requires no equipment and, therefore, can be done without cost. -What is the research hypothesis?

(Multiple Choice)

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Question 57

If the cutoff Z score on the comparison distribution is -1.64 and the sample Z score is 2.05 on the comparison distribution,the correct decision is to

(Multiple Choice)

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Question 58

If the cutoff Z score on the comparison distribution is ±1.96,a psychologist CANNOT reject the null hypothesis if the sample Z score on this distribution is

(Multiple Choice)

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Question 59

The first step of hypothesis testing involves specifying the

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Question 60

Showing 41 - 60 of 71

If a counseling psychologist wants to know if doubling the number of counseling sessions attended by students experiencing severe test anxiety will reduce or increase the amount of anxiety the students report just before a test,the statistical test the psychologist would use would be

If Population 2 refers to people in general,Population 1 refers to __________.

Rejecting the null hypothesis at the .05 level means that

A research hypothesis that does not predict a particular direction of difference between populations is called a(n)__________ hypothesis.

When the results of a study are not extreme enough to reject the null hypothesis,a psychologist can conclude with reasonable confidence that

A psychologist who rejects the null hypothesis-because the probability of obtaining the results if the null hypothesis is true is less than 5%-would express this finding in symbols as

The distribution that represents the situation in which the null hypothesis is true is

A two-tailed test is associated with

For a nondirectional research hypothesis,the null hypothesis is expressed in symbols as __________.

If a health psychologist wants to know if regular exercise improves people's health,the type of hypothesis the psychologist would use is

A psychologist who states the hypothesis that there will be no difference between a new approach to therapy and the standard approach is stating a

The region of the comparison distribution in which the null hypothesis will be rejected is all on one side of the distribution for a(n)__________.

When the null hypothesis is rejected,the results of a study are said to be __________.

The conventional levels of significance in hypothesis testing in psychology are

If you set alpha to .001 and are conducting a one-tailed test,what value do you need to look up in the normal curve table to determine the cutoff Z score on the comparison distribution?

A health psychologist is interested in the effectiveness of a new exercise on reducing the rate of heart attacks because the exercise requires no equipment and, therefore, can be done without cost. -What is the research hypothesis?

If the cutoff Z score on the comparison distribution is -1.64 and the sample Z score is 2.05 on the comparison distribution,the correct decision is to

If the cutoff Z score on the comparison distribution is ±1.96,a psychologist CANNOT reject the null hypothesis if the sample Z score on this distribution is

The first step of hypothesis testing involves specifying the

Displaying the Order in a Group of Numbers

Central Tendency and Variability

Some Key Ingredients for Inferential Statistics: Z Scores,the Normal Curve, Sample Versus Population, and Probability

Hypothesis Tests With Means of Samples

Making Sense of Statistical Significance:decision Errors, Effect Size, and Statistical Power

Introduction to T Tests: Single Sample and Dependent Means

The T Test for Independent Means

Introduction to the Analysis of Variance

Factorial Analysis of Variance

Correlation

Prediction

Chi-Square Tests

Strategies When Population Distributions Are Not Normal: Data Transformations and Rank-Order Tests

The General Linear Model and Making Sense of Advanced Statistical Procedures in Research Articles

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