Question 1

If experimental treatments produce an effect,

Accepted Answer

A)  between-groups variance will increase. 
B)  between-groups variance will decrease. 
C)  within-groups variance will increase. 
D)  within-groups variance will decrease. 
A)  between-groups variance will increase. 
B)  between-groups variance will decrease. 
C)  within-groups variance will increase. 
D)  within-groups variance will decrease.

Question 2

The inflection point in the normal curve is _____________ from the mean.

Accepted Answer

A)  less one standard deviation 
B)  two standard deviations 
C)  three standard deviations 
D)  one standard deviation 
A)  less one standard deviation 
B)  two standard deviations 
C)  three standard deviations 
D)  one standard deviation

Question 3

What are standard scores? How are they calculated? Why are they useful?

Accepted Answer

Standard scores, also known as z-scores,

Question 4

In a multifactor analysis of variance, how the variables affect one another is called

Accepted Answer

A)  a main effect. 
B)  an interaction effect. 
C)  an experimental effect. 
D)  a variance effect. 
A)  a main effect. 
B)  an interaction effect. 
C)  an experimental effect. 
D)  a variance effect.

Question 5

The power of a test is the probability of rejecting the null hypothesis when it is actually true.

Accepted Answer

A) True 
 B)False

Question 6

Describe three ways that statistics can be misused to create a false impression.

Accepted Answer

1. Cherry-picking data: One way statisti

Question 7

If the null hypothesis is true, alpha equals the type I error probability.

Accepted Answer

A) True 
 B)False

Question 8

The variance of a distribution is defined as the sum of the squared deviations from the mean divided by the number of scores.

Accepted Answer

A) True 
 B)False

Question 9

It is impossible to prove the alternative hypothesis to be true.

Accepted Answer

A) True 
 B)False

Question 10

The standard deviation is

Accepted Answer

A)  the square of the variance. 
B)  the square root of the variance. 
C)  smaller than the mean. 
D)  the difference between the highest and lowest scores. 
A)  the square of the variance. 
B)  the square root of the variance. 
C)  smaller than the mean. 
D)  the difference between the highest and lowest scores.

Question 11

Two-tailed tests are more liberal and less powerful than one?tailed tests.

Accepted Answer

A) True 
 B)False

Question 12

Which of the following is a parametric test?

Accepted Answer

A)  Mann-Whitney U Test 
B)  sign test 
C)  t test 
D)   Test of Independence 
A)  Mann-Whitney U Test 
B)  sign test 
C)  t test 
D)   Test of Independence

Question 13

What is the difference between parametric and nonparametric tests? Give two examples of each type.

Accepted Answer

Parametric tests and nonparametric tests

Question 14

Rejecting the null hypothesis when it is actually false is

Accepted Answer

A)  a Type I error. 
B)  a Type II error. 
C)  more likely with two-tailed tests. 
D)  a correct decision. 
A)  a Type I error. 
B)  a Type II error. 
C)  more likely with two-tailed tests. 
D)  a correct decision.

Question 15

The mean is

Accepted Answer

A)  the arithmetic average. 
B)  the middle score. 
C)  the average of the highest and lowest scores. 
D)  the most common score. 
A)  the arithmetic average. 
B)  the middle score. 
C)  the average of the highest and lowest scores. 
D)  the most common score.

Question 16

If a person's score is part of a normal distribution of scores, we can determine the relative rank of that score if we know

Accepted Answer

A)  the person's score. 
B)  the mean of the distribution. 
C)  the standard deviation of the distribution. 
D)  we must know all of these 
A)  the person's score. 
B)  the mean of the distribution. 
C)  the standard deviation of the distribution. 
D)  we must know all of these

Question 17

Inferential statistics allow you to decide whether a difference between the experimental and the control group is due to _______________ or ________________.

Accepted Answer

A)  manipulation; chance 
B)  manipulation; experimental error 
C)  sampling error; independent variable 
D)  independent variable; experimental error 
A)  manipulation; chance 
B)  manipulation; experimental error 
C)  sampling error; independent variable 
D)  independent variable; experimental error

Question 18

The Mann-Whitney U test is

Accepted Answer

A)  nonparametric. 
B)  distribution free. 
C)  designed for two groups of scores. 
D)  all of these 
A)  nonparametric. 
B)  distribution free. 
C)  designed for two groups of scores. 
D)  all of these

Question 19

The degrees of freedom equals the number of scores that are free to vary minus one.

Accepted Answer

A) True 
 B)False

Question 20

Characteristics of a population of scores are called parameters, while characteristics of a sample of scores drawn from a larger population are called statistics.

Accepted Answer

A) True 
 B)False

If experimental treatments produce an effect,

The inflection point in the normal curve is _____________ from the mean.

What are standard scores? How are they calculated? Why are they useful?

In a multifactor analysis of variance, how the variables affect one another is called

The power of a test is the probability of rejecting the null hypothesis when it is actually true.

Describe three ways that statistics can be misused to create a false impression.

If the null hypothesis is true, alpha equals the type I error probability.

The variance of a distribution is defined as the sum of the squared deviations from the mean divided by the number of scores.

It is impossible to prove the alternative hypothesis to be true.

The standard deviation is

Two-tailed tests are more liberal and less powerful than one?tailed tests.

Which of the following is a parametric test?

What is the difference between parametric and nonparametric tests? Give two examples of each type.

Rejecting the null hypothesis when it is actually false is

The mean is

If a person's score is part of a normal distribution of scores, we can determine the relative rank of that score if we know

Inferential statistics allow you to decide whether a difference between the experimental and the control group is due to _ or __.

The Mann-Whitney U test is

The degrees of freedom equals the number of scores that are free to vary minus one.

Characteristics of a population of scores are called parameters, while characteristics of a sample of scores drawn from a larger population are called statistics.

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

If experimental treatments produce an effect,

The inflection point in the normal curve is _____________ from the mean.

What are standard scores? How are they calculated? Why are they useful?

In a multifactor analysis of variance, how the variables affect one another is called

The power of a test is the probability of rejecting the null hypothesis when it is actually true.

Describe three ways that statistics can be misused to create a false impression.

If the null hypothesis is true, alpha equals the type I error probability.

The variance of a distribution is defined as the sum of the squared deviations from the mean divided by the number of scores.

It is impossible to prove the alternative hypothesis to be true.

The standard deviation is

Two-tailed tests are more liberal and less powerful than one?tailed tests.

Which of the following is a parametric test?

What is the difference between parametric and nonparametric tests? Give two examples of each type.

Rejecting the null hypothesis when it is actually false is

The mean is

If a person's score is part of a normal distribution of scores, we can determine the relative rank of that score if we know

Inferential statistics allow you to decide whether a difference between the experimental and the control group is due to _______________ or ________________.

The Mann-Whitney U test is

The degrees of freedom equals the number of scores that are free to vary minus one.

Characteristics of a population of scores are called parameters, while characteristics of a sample of scores drawn from a larger population are called statistics.

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

Inferential statistics allow you to decide whether a difference between the experimental and the control group is due to _ or __.