Question 1

A set of principles that attempt to explain a set of facts,relationships,or events is a(n)__________.

Accepted Answer

The answer of A set of principles that attempt to...

Question 2

"There is no difference in voting between those who do and do not listen regularly to radio talk shows" is the __________ hypothesis.

Accepted Answer

The answer of "There is no difference in voting between...

Question 3

A result is considered statistically significant when

Accepted Answer

A) the sample score is so extreme that the research hypothesis is rejected. 
B) the sample score is so extreme that the null hypothesis is rejected. 
C) the population mean is so extreme that the research hypothesis is rejected. 
D) the population mean is so extreme that the null hypothesis is rejected. 
A) the sample score is so extreme that the research hypothesis is rejected. 
B) the sample score is so extreme that the null hypothesis is rejected. 
C) the population mean is so extreme that the research hypothesis is rejected. 
D) the population mean is so extreme that the null hypothesis is rejected.

Question 4

When psychologists study a sample to see if it represents a population (called Population 1)that is different from a known population (called Population 2),the comparison distribution is

Accepted Answer

A) the same as the distribution of Population 1. 
B) the same as the distribution of Population 2. 
C) a rectangular distribution with the same mean and standard deviation as Population 1. 
D) a rectangular distribution with the same mean and standard deviation as Population 2. 
A) the same as the distribution of Population 1. 
B) the same as the distribution of Population 2. 
C) a rectangular distribution with the same mean and standard deviation as Population 1. 
D) a rectangular distribution with the same mean and standard deviation as Population 2.

Question 5

Most psychologists use the __________ significance level,but those wanting to be more conservative may use the __________ level.

Accepted Answer

The answer of Most psychologists use the __________ significance level,but...

Question 6

The decision to reject the null hypothesis using the Z test is made

Accepted Answer

A) if the Z score is less than -1 or greater than 1. 
B) if the Z score is greater than 2.5. 
C) by comparing the Z score needed to reject the null hypothesis to the actual Z score of the sample. 
D) by comparing the standard deviation of the sample (S
D) to the standard deviation of the population (σ). 
A) if the Z score is less than -1 or greater than 1. 
B) if the Z score is greater than 2.5. 
C) by comparing the Z score needed to reject the null hypothesis to the actual Z score of the sample. 
D) by comparing the standard deviation of the sample (S
D) to the standard deviation of the population (σ).

Question 7

In hypothesis testing,a statement about the predicted relation between populations is the __________.

Accepted Answer

The answer of In hypothesis testing,a statement about the predicted...

Question 8

The researchers would use a(n)__________-tailed test.

Accepted Answer

The answer of The researchers would use a(n)__________-tailed test....

Question 9

A one-tailed test is associated with

Accepted Answer

A) the research hypothesis. 
B) the null hypothesis. 
C) a nondirectional hypothesis. 
D) a directional hypothesis. 
A) the research hypothesis. 
B) the null hypothesis. 
C) a nondirectional hypothesis. 
D) a directional hypothesis.

Question 10

When a psychologist rejects the null hypothesis at the .05 level,the results of a study indicate that

Accepted Answer

A) there is less than a 5% chance of getting such an extreme result if the null hypothesis is true. 
B) there is more than a 5% chance of getting such an extreme result if the null hypothesis is true. 
C) there is a 5% chance that the research hypothesis is true. 
D) there is a 95% chance that the research hypothesis is true. 
A) there is less than a 5% chance of getting such an extreme result if the null hypothesis is true. 
B) there is more than a 5% chance of getting such an extreme result if the null hypothesis is true. 
C) there is a 5% chance that the research hypothesis is true. 
D) there is a 95% chance that the research hypothesis is true.

Question 11

Sometimes,a research hypothesis may be referred to as a(n)__________.

Accepted Answer

A
lternati

Question 12

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 null hypothesis?

Accepted Answer

A) People will not participate because it does not cost them any money. 
B) The exercise will make no difference in the rate of heart attacks. 
C) The exercise will make no difference or will reduce the rate of heart attacks. 
D) The exercise will make no difference or will increase the rate of heart attacks. 
A) People will not participate because it does not cost them any money. 
B) The exercise will make no difference in the rate of heart attacks. 
C) The exercise will make no difference or will reduce the rate of heart attacks. 
D) The exercise will make no difference or will increase the rate of heart attacks.

Question 13

An increasingly common way to report the results of statistical tests in a research article is

Accepted Answer

A) p = .049 B) p > .05 C) p < .05 D) p < t A) p = .049 B) p > .05 C) p < .05 D) p < t

Question 14

Which of the following statements is the most accurate description of hypothesis testing?

Accepted Answer

A) It is a central theme in the statistical analysis of virtually all psychology research. 
B) It is a simple part of statistics that only applies to three statistical procedures. 
C) It is a fairly uncommon way of using statistics. 
D) It is a kind of statistical procedure that is used mainly as part of descriptive statistics. 
A) It is a central theme in the statistical analysis of virtually all psychology research. 
B) It is a simple part of statistics that only applies to three statistical procedures. 
C) It is a fairly uncommon way of using statistics. 
D) It is a kind of statistical procedure that is used mainly as part of descriptive statistics.

Question 15

The comparison distribution is based on the distribution of the voting behavior of __________.

Accepted Answer

people in

Question 16

How would a psychologist test the hypothesis that a new stress-reduction program really works?

Accepted Answer

A) Try to reject the hypothesis that it does work. 
B) Try to accept the hypothesis that it does work. 
C) Try to reject the hypothesis that it does not work. 
D) Try to accept the hypothesis that it does not work. 
A) Try to reject the hypothesis that it does work. 
B) Try to accept the hypothesis that it does work. 
C) Try to reject the hypothesis that it does not work. 
D) Try to accept the hypothesis that it does not work.

Question 17

The situation in which the null hypothesis is true is represented by the __________ distribution.

Accepted Answer

comparison

Question 18

A forensic psychologist studying the accuracy of a new type of polygraph (lie detector)test instructed a participant ahead of time to lie about some of the questions asked by the polygraph operator.On average,the current polygraph test is 75% accurate,with a standard deviation of 6.5%.With the new machine,the operator correctly identified 83.5% of the false responses.Using the .05 level of significance,is the accuracy of the new polygraph different from the current one?
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.

Accepted Answer

A)Cutoff Z (.05 level,two-tailed)= ±1.96

Question 19

If the cutoff Z score on the comparison distribution is ±1.96 and the sample Z score on the comparison distribution is -2.05,the correct decision is to

Accepted Answer

A) fail to reject the null hypothesis. 
B) reject the null hypothesis. 
C) accept the research hypothesis. 
D) fail to accept the research hypothesis. 
A) fail to reject the null hypothesis. 
B) reject the null hypothesis. 
C) accept the research hypothesis. 
D) fail to accept the research hypothesis.

Question 20

A dermatologist is interested in whether a new treatment for poison ivy would reduce symptoms more quickly than the current treatment.In general,the current treatment completely eliminates symptoms after an average of 6 days,with a standard deviation of 1.2 days.One randomly selected patient given the new treatment had no symptoms after 5 days.Using the .05 level of significance,is the new treatment faster than the current one?
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.

Accepted Answer

A)Cutoff Z (.05 level,one-tailed-low)= -

A set of principles that attempt to explain a set of facts,relationships,or events is a(n)__________.

"There is no difference in voting between those who do and do not listen regularly to radio talk shows" is the __________ hypothesis.

A result is considered statistically significant when

When psychologists study a sample to see if it represents a population (called Population 1)that is different from a known population (called Population 2),the comparison distribution is

Most psychologists use the significance level,but those wanting to be more conservative may use the level.

The decision to reject the null hypothesis using the Z test is made

In hypothesis testing,a statement about the predicted relation between populations is the __________.

The researchers would use a(n)__________-tailed test.

A one-tailed test is associated with

When a psychologist rejects the null hypothesis at the .05 level,the results of a study indicate that

Sometimes,a research hypothesis may be referred to as a(n)__________.

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 null hypothesis?

An increasingly common way to report the results of statistical tests in a research article is

Which of the following statements is the most accurate description of hypothesis testing?

The comparison distribution is based on the distribution of the voting behavior of __________.

How would a psychologist test the hypothesis that a new stress-reduction program really works?

The situation in which the null hypothesis is true is represented by the __________ distribution.

If the cutoff Z score on the comparison distribution is ±1.96 and the sample Z score on the comparison distribution is -2.05,the correct decision is to

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

Filters

Exam 4: Introduction to Hypothesis Testing

A set of principles that attempt to explain a set of facts,relationships,or events is a(n)__________.

"There is no difference in voting between those who do and do not listen regularly to radio talk shows" is the __________ hypothesis.

A result is considered statistically significant when

When psychologists study a sample to see if it represents a population (called Population 1)that is different from a known population (called Population 2),the comparison distribution is

Most psychologists use the __________ significance level,but those wanting to be more conservative may use the __________ level.

The decision to reject the null hypothesis using the Z test is made

In hypothesis testing,a statement about the predicted relation between populations is the __________.

The researchers would use a(n)__________-tailed test.

A one-tailed test is associated with

When a psychologist rejects the null hypothesis at the .05 level,the results of a study indicate that

Sometimes,a research hypothesis may be referred to as a(n)__________.

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 null hypothesis?

An increasingly common way to report the results of statistical tests in a research article is

Which of the following statements is the most accurate description of hypothesis testing?

The comparison distribution is based on the distribution of the voting behavior of __________.

How would a psychologist test the hypothesis that a new stress-reduction program really works?

The situation in which the null hypothesis is true is represented by the __________ distribution.

If the cutoff Z score on the comparison distribution is ±1.96 and the sample Z score on the comparison distribution is -2.05,the correct decision is to

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

Filters

Most psychologists use the significance level,but those wanting to be more conservative may use the level.