Question 1

The use of tind rests on the assumption that.

Accepted Answer

A) each subject is randomly selected 
B) each subject is randomly assigned to a group 
C) the population sizes are equal 
D) the population means are equal 
A) each subject is randomly selected 
B) each subject is randomly assigned to a group 
C) the population sizes are equal 
D) the population means are equal

Question 2

In an experiment designed to measure the effect of a drug on behavior, one group may be given a medication with no active ingredient; this group is identified as a(n) control group.

Accepted Answer

A) dependent variable 
B) confounded 
C) experimental treatment 
D) placebo 
A) dependent variable 
B) confounded 
C) experimental treatment 
D) placebo

Question 3

If the result of a tind on an experiment is reported as t(28) = 2.633, p < .05, then you know that the.

Accepted Answer

A) critical value of t was 2.633 
B) alpha level was less than .05 
C) observed value of t was 2.633 
D) total number of subjects was 28 
A) critical value of t was 2.633 
B) alpha level was less than .05 
C) observed value of t was 2.633 
D) total number of subjects was 28

Question 4

The power of tind can be increased by.

Accepted Answer

A) minimizing the effect of the independent variable 
B) increasing the value of s $\bar { x } _ { 1 } = \bar { x } _ { 2 }$ 
C) decreasing the difference between 
D) decreasing the value of 
A) minimizing the effect of the independent variable 
B) increasing the value of s $\bar { x } _ { 1 } = \bar { x } _ { 2 }$ 
C) decreasing the difference between 
D) decreasing the value of

Question 5

In a within-subjects design,.

Accepted Answer

A) all groups of subjects receive different levels of each independent variable 
B) a single group of subjects is given each level of the independent variable 
C) all groups of subjects receive the same levels of each independent variable 
D) all subjects are matched for attributes on extraneous variables 
A) all groups of subjects receive different levels of each independent variable 
B) a single group of subjects is given each level of the independent variable 
C) all groups of subjects receive the same levels of each independent variable 
D) all subjects are matched for attributes on extraneous variables

Question 6

Saying that a statistical test is "robust" means that violating an assumption of the test has little effect on the.

Accepted Answer

A) probability of a Type I error 
B) probability of a Type II error 
C) obtained value of the standard error of the difference between means 
D) sampling distribution of differences between sample means 
A) probability of a Type I error 
B) probability of a Type II error 
C) obtained value of the standard error of the difference between means 
D) sampling distribution of differences between sample means

Question 7

The power of a statistical test is the probability of rejecting H0 when H0 is and H1 is .

Accepted Answer

A) true; true 
B) true; false 
C) false; false 
D) false; true 
A) true; true 
B) true; false 
C) false; false 
D) false; true

Question 8

Eta squared is a measure of the.

Accepted Answer

A) power of a statistical test 
B) strength of association 
C) amount of error variation within groups 
D) probability of making correct decisions about the statistical null and alternative hypotheses 
A) power of a statistical test 
B) strength of association 
C) amount of error variation within groups 
D) probability of making correct decisions about the statistical null and alternative hypotheses

Question 9

The alternative hypothesis for tind is H1:.

Accepted Answer

A)  $\bar { X } _ { 1 } = \bar { X } _ { 2 }$ 
B)  $\bar { X } _ { 1 } \neq \bar { X } _ { 2 }$ 
C)  $\mu _ { 1 } = \mu _ { 2 }$ 
D)  $\quad \mu _ { 1 } \neq \mu _ { 2 }$ 
A)  $\bar { X } _ { 1 } = \bar { X } _ { 2 }$ 
B)  $\bar { X } _ { 1 } \neq \bar { X } _ { 2 }$ 
C)  $\mu _ { 1 } = \mu _ { 2 }$ 
D)  $\quad \mu _ { 1 } \neq \mu _ { 2 }$

Question 10

If the sample means in an experiment differ significantly using tind, then.

Accepted Answer

A) the null hypothesis was rejected 
B) the experiment could not have been confounded 
C) the alternative hypothesis was not accepted 
D) all the above 
A) the null hypothesis was rejected 
B) the experiment could not have been confounded 
C) the alternative hypothesis was not accepted 
D) all the above

Question 11

The value of may range from.

Accepted Answer

A) 0.0 to 100.0 $\eta ^ { 2 }$ 
B) 0.0 to 1.0 
C) -1.0 to +1.0 
D) -10.0 to +10.0 
A) 0.0 to 100.0 $\eta ^ { 2 }$ 
B) 0.0 to 1.0 
C) -1.0 to +1.0 
D) -10.0 to +10.0

Question 12

If tobs does not fall into the rejection region, then which of the following is true?

Accepted Answer

A) The probability of obtaining tobs if H0 is true is less than .05. 
B) The alternative hypothesis is accepted. 
C) The null hypothesis is rejected. 
D) The null hypothesis is not rejected. 
A) The probability of obtaining tobs if H0 is true is less than .05. 
B) The alternative hypothesis is accepted. 
C) The null hypothesis is rejected. 
D) The null hypothesis is not rejected.

Question 13

If two groups are expected to differ only by chance before the independent variable is given, then the groups are considered to be.

Accepted Answer

A) separate but equal 
B) identical 
C) equivalent 
D) matched 
A) separate but equal 
B) identical 
C) equivalent 
D) matched

Question 14

Extensive error variation within the groups of an experiment will.

Accepted Answer

A) increase the probability of a Type I error 
B) result in a more detectable treatment effect 
C) increase the power of a statistical test 
D) decrease the power of a statistical test 
A) increase the probability of a Type I error 
B) result in a more detectable treatment effect 
C) increase the power of a statistical test 
D) decrease the power of a statistical test

Question 15

Increasing the sample size in an experiment will.

Accepted Answer

A) decrease the standard error of the difference between means 
B) increase the standard error of the difference between means 
C) increase the difference between 
D) decrease the difference between 
A) decrease the standard error of the difference between means 
B) increase the standard error of the difference between means 
C) increase the difference between 
D) decrease the difference between

Question 16

Obtaining participants for an experiment by asking people accessible to the experimenter to participate is called sampling

Accepted Answer

A) simple random 
B) valid 
C) convenience 
D) experimental 
A) simple random 
B) valid 
C) convenience 
D) experimental

Question 17

If tobs falls into a rejection region, then the decision is to.

Accepted Answer

A) reject the null hypothesis 
B) fail to reject the null hypothesis 
C) do not accept the alternative hypothesis 
D) increase the value of alpha 
A) reject the null hypothesis 
B) fail to reject the null hypothesis 
C) do not accept the alternative hypothesis 
D) increase the value of alpha

Question 18

If tobs does not fall into a rejection region, then the.

Accepted Answer

A) value of alpha should be changed from .05 to .01 
B) mean of the sampling distribution of the t statistic is not equal to zero 
C) standard error is smaller than the hypothesized difference in population means 
D) null hypothesis is not rejected 
A) value of alpha should be changed from .05 to .01 
B) mean of the sampling distribution of the t statistic is not equal to zero 
C) standard error is smaller than the hypothesized difference in population means 
D) null hypothesis is not rejected

Question 19

If the sample means in an experiment differ significantly using tind, then the.

Accepted Answer

A) null hypothesis was accepted 
B) difference is attributed to chance 
C) difference is attributed to the dependent variable 
D) difference is attributed to the independent variable 
A) null hypothesis was accepted 
B) difference is attributed to chance 
C) difference is attributed to the dependent variable 
D) difference is attributed to the independent variable

Question 20

If H0 is not rejected in a tind test, then.

Accepted Answer

A) H1 is accepted 
B) the alpha level should be increased 
C) the observed difference between the sample means is attributed to sampling error 
D) the distribution of scores in the sample is normal 
A) H1 is accepted 
B) the alpha level should be increased 
C) the observed difference between the sample means is attributed to sampling error 
D) the distribution of scores in the sample is normal

The use of tind rests on the assumption that.

In an experiment designed to measure the effect of a drug on behavior, one group may be given a medication with no active ingredient; this group is identified as a(n) control group.

If the result of a tind on an experiment is reported as t(28) = 2.633, p < .05, then you know that the.

The power of tind can be increased by.

In a within-subjects design,.

Saying that a statistical test is "robust" means that violating an assumption of the test has little effect on the.

The power of a statistical test is the probability of rejecting H0 when H0 is and H1 is .

Eta squared is a measure of the.

The alternative hypothesis for tind is H1:.

If the sample means in an experiment differ significantly using tind, then.

The value of may range from.

If tobs does not fall into the rejection region, then which of the following is true?

If two groups are expected to differ only by chance before the independent variable is given, then the groups are considered to be.

Extensive error variation within the groups of an experiment will.

Increasing the sample size in an experiment will.

Obtaining participants for an experiment by asking people accessible to the experimenter to participate is called sampling

If tobs falls into a rejection region, then the decision is to.

If tobs does not fall into a rejection region, then the.

If the sample means in an experiment differ significantly using tind, then the.

If H0 is not rejected in a tind test, then.

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

Is There Really a Difference Introduction to Statistical Hypothesis Testing

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Correlation: Understanding Covariation

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

Filters

Exam 9: The Basics of Experimentation and Testing for a Difference Between Means

The use of tind rests on the assumption that.

In an experiment designed to measure the effect of a drug on behavior, one group may be given a medication with no active ingredient; this group is identified as a(n) control group.

If the result of a tind on an experiment is reported as t(28) = 2.633, p < .05, then you know that the.

The power of tind can be increased by.

In a within-subjects design,.

Saying that a statistical test is "robust" means that violating an assumption of the test has little effect on the.

The power of a statistical test is the probability of rejecting H0 when H0 is and H1 is .

Eta squared is a measure of the.

The alternative hypothesis for tind is H1:.

If the sample means in an experiment differ significantly using tind, then.

The value of may range from.

If tobs does not fall into the rejection region, then which of the following is true?

If two groups are expected to differ only by chance before the independent variable is given, then the groups are considered to be.

Extensive error variation within the groups of an experiment will.

Increasing the sample size in an experiment will.

Obtaining participants for an experiment by asking people accessible to the experimenter to participate is called sampling

If tobs falls into a rejection region, then the decision is to.

If tobs does not fall into a rejection region, then the.

If the sample means in an experiment differ significantly using tind, then the.

If H0 is not rejected in a tind test, then.

Making Sense of Variability: an Introduction to Statistics

Statistics in the Context of Scientific Research

Looking at Data: Frequency Distributions and Graphs

Looking at Data: Measures of Central Tendency

Looking at Data: Measures of Variability

The Normal Distribution, Probability, and Standard Scores

Understanding Data: Using Statistics for Inference and Estimation

Is There Really a Difference Introduction to Statistical Hypothesis Testing

One-Factor Between-Subjects Analysis of Variance

Two-Factor Between-Subjects Analysis of Variance

One-Factor Within-Subjects Analysis of Variance

Correlation: Understanding Covariation

Regression Analysis: Predicting Linear Relationships

Nonparametric Tests

Filters