Question 1

The larger the sample, the more we can trust the sample ___________ to be an estimate of the population ___________.

Accepted Answer

A)  mean; mean 
B)  standard error of the mean; standard deviation 
C)  standard error of the mean; variance 
D)  difference; mean 
A)  mean; mean 
B)  standard error of the mean; standard deviation 
C)  standard error of the mean; variance 
D)  difference; mean

Question 2

The Pearson product?moment correlation coefficient is referred to as

Accepted Answer

A)  z-score. 
B)  s.d. 
C)  r. 
D)  p.c.c. 
A)  z-score. 
B)  s.d. 
C)  r. 
D)  p.c.c.

Question 3

If the null hypothesis is true, F should be 1.0. If the null hypothesis is false, F should be greater than 1.0. However, sometimes Fs less than 1.0 are observed. Explain the logic behind the F test and how Fs less than 1.0 can be obtained.

Accepted Answer

The F test is a statistical test used to

Question 4

The t test is a nonparametric test.

Accepted Answer

A) True 
 B)False

Question 5

In describing an array of data, psychologists typically present two descriptive statistics, the mean and the variance.

Accepted Answer

A) True 
 B)False

Question 6

The standard error of the mean is the standard deviation of a distribution of sample means.

Accepted Answer

A) True 
 B)False

Question 7

As the level of significance is changed from .01 to .05, the probability of making a type I error increases and the probability of making a type II error decreases.

Accepted Answer

A) True 
 B)False

Question 8

A score that lies one standard deviation above the mean

Accepted Answer

A)  has the same X value as the point of inflection. 
B)  has a z-value of +1.0. 
C)  has a z-value of -1.0. 
D)  has a z-score equal to the mean. 
A)  has the same X value as the point of inflection. 
B)  has a z-value of +1.0. 
C)  has a z-value of -1.0. 
D)  has a z-score equal to the mean.

Question 9

In hypothesis testing, both the magnitude of the difference and the direction of the difference between two groups are considered in

Accepted Answer

A)  two-tailed tests. 
B)  one-tailed tests. 
C)  parametric tests. 
D)  nonparametric tests. 
A)  two-tailed tests. 
B)  one-tailed tests. 
C)  parametric tests. 
D)  nonparametric tests.

Question 10

The standard error of the mean increases with increasing sample size.

Accepted Answer

A) True 
 B)False

Question 11

The null hypothesis suggests that the two samples come from ___________ distribution(s), and the experimental hypothesis suggests that the two samples come from _____________ distribution(s).

Accepted Answer

A)  different; different 
B)  different; the same 
C)  the same; different 
D)  the same; the same 
A)  different; different 
B)  different; the same 
C)  the same; different 
D)  the same; the same

Question 12

What is the difference between inferential statistics and descriptive statistics? Give two examples of each type.

Accepted Answer

Inferential statistics and descriptive s

Question 13

What is power? What are the factors that influence the power of a statistical test?

Accepted Answer

Power in statistics refers to the probab

Question 14

Which of the following is the most useful descriptive statistic for measuring dispersion?

Accepted Answer

A)  range 
B)  variance 
C)  mean deviation 
D)  standard deviation 
A)  range 
B)  variance 
C)  mean deviation 
D)  standard deviation

Question 15

In comparison with a confidence level of 0.05, a confidence level of 0.01 means

Accepted Answer

A)  you are less sure that the null hypothesis is wrong. 
B)  you are more sure that the null hypothesis is wrong. 
C)  you are absolutely sure that the null hypothesis is wrong. 
D)  you are more sure that the experimental hypothesis is wrong. 
A)  you are less sure that the null hypothesis is wrong. 
B)  you are more sure that the null hypothesis is wrong. 
C)  you are absolutely sure that the null hypothesis is wrong. 
D)  you are more sure that the experimental hypothesis is wrong.

Question 16

The ________________ is the sum of all the scores divided by the number of scores.

Accepted Answer

A)  median 
B)  mean 
C)  mode 
D)  standard deviation 
A)  median 
B)  mean 
C)  mode 
D)  standard deviation

Question 17

Simple analysis of variance is used in designs having

Accepted Answer

A)  one independent variable. 
B)  more than one independent variable. 
C)  more than one independent variable (IV) but less than four IVs. 
D)  more than one dependent variable. 
A)  one independent variable. 
B)  more than one independent variable. 
C)  more than one independent variable (IV) but less than four IVs. 
D)  more than one dependent variable.

Question 18

The median is often used because it is insensitive to extreme scores.

Accepted Answer

A) True 
 B)False

Question 19

Discuss the various measures of dispersion (i.e., absolute mean deviation, variance, and standard deviation). Which of them do you think is the most useful? Why?

Accepted Answer

Measures of dispersion are used to descr

Question 20

The Wilcoxon signed-ranks test

Accepted Answer

A)  is used for between-subjects designs. 
B)  takes into account both the magnitude and the direction of the difference between paired scores. 
C)  cannot be used for within-subjects designs. 
D)  is a parametric test. 
A)  is used for between-subjects designs. 
B)  takes into account both the magnitude and the direction of the difference between paired scores. 
C)  cannot be used for within-subjects designs. 
D)  is a parametric test.

The larger the sample, the more we can trust the sample _ to be an estimate of the population _.

The Pearson product?moment correlation coefficient is referred to as

If the null hypothesis is true, F should be 1.0. If the null hypothesis is false, F should be greater than 1.0. However, sometimes Fs less than 1.0 are observed. Explain the logic behind the F test and how Fs less than 1.0 can be obtained.

The t test is a nonparametric test.

In describing an array of data, psychologists typically present two descriptive statistics, the mean and the variance.

The standard error of the mean is the standard deviation of a distribution of sample means.

As the level of significance is changed from .01 to .05, the probability of making a type I error increases and the probability of making a type II error decreases.

A score that lies one standard deviation above the mean

In hypothesis testing, both the magnitude of the difference and the direction of the difference between two groups are considered in

The standard error of the mean increases with increasing sample size.

The null hypothesis suggests that the two samples come from _ distribution(s), and the experimental hypothesis suggests that the two samples come from ___ distribution(s).

What is the difference between inferential statistics and descriptive statistics? Give two examples of each type.

What is power? What are the factors that influence the power of a statistical test?

Which of the following is the most useful descriptive statistic for measuring dispersion?

In comparison with a confidence level of 0.05, a confidence level of 0.01 means

The ________________ is the sum of all the scores divided by the number of scores.

Simple analysis of variance is used in designs having

The median is often used because it is insensitive to extreme scores.

Discuss the various measures of dispersion (i.e., absolute mean deviation, variance, and standard deviation). Which of them do you think is the most useful? Why?

The Wilcoxon signed-ranks test

Explanation in Scientific Psychology

Research Techniques: Observation and Correlation

Research Techniques: Experiments

Ethics in Psychological Research

How to Read and Write Research Reports

Psychophysics

Perception

Attention and Reaction Time

Learning and Conditioning

Remembering and Forgetting

Thinking and Problem Solving

Individual Differences and Development

Social Psychology

Environmental Psychology

Human Factors

Experimental Psychology: A Historical Sketch

Filters

Exam 17: Statistical Reasoning: An Introduction

The larger the sample, the more we can trust the sample ___________ to be an estimate of the population ___________.

The Pearson product?moment correlation coefficient is referred to as

If the null hypothesis is true, F should be 1.0. If the null hypothesis is false, F should be greater than 1.0. However, sometimes Fs less than 1.0 are observed. Explain the logic behind the F test and how Fs less than 1.0 can be obtained.

The t test is a nonparametric test.

In describing an array of data, psychologists typically present two descriptive statistics, the mean and the variance.

The standard error of the mean is the standard deviation of a distribution of sample means.

As the level of significance is changed from .01 to .05, the probability of making a type I error increases and the probability of making a type II error decreases.

A score that lies one standard deviation above the mean

In hypothesis testing, both the magnitude of the difference and the direction of the difference between two groups are considered in

The standard error of the mean increases with increasing sample size.

The null hypothesis suggests that the two samples come from ___________ distribution(s), and the experimental hypothesis suggests that the two samples come from _____________ distribution(s).

What is the difference between inferential statistics and descriptive statistics? Give two examples of each type.

What is power? What are the factors that influence the power of a statistical test?

Which of the following is the most useful descriptive statistic for measuring dispersion?

In comparison with a confidence level of 0.05, a confidence level of 0.01 means

The ________________ is the sum of all the scores divided by the number of scores.

Simple analysis of variance is used in designs having

The median is often used because it is insensitive to extreme scores.

Discuss the various measures of dispersion (i.e., absolute mean deviation, variance, and standard deviation). Which of them do you think is the most useful? Why?

The Wilcoxon signed-ranks test

Explanation in Scientific Psychology

Research Techniques: Observation and Correlation

Research Techniques: Experiments

Ethics in Psychological Research

How to Read and Write Research Reports

Psychophysics

Perception

Attention and Reaction Time

Learning and Conditioning

Remembering and Forgetting

Thinking and Problem Solving

Individual Differences and Development

Social Psychology

Environmental Psychology

Human Factors

Experimental Psychology: A Historical Sketch

Filters

The larger the sample, the more we can trust the sample _ to be an estimate of the population _.

The null hypothesis suggests that the two samples come from _ distribution(s), and the experimental hypothesis suggests that the two samples come from ___ distribution(s).