Question 1

A measure of the magnitude of the difference between two groups is _____.

Accepted Answer

A) effect size 
B) significance level 
C) error size 
D) effect size. 
A) effect size 
B) significance level 
C) error size 
D) effect size.

Question 2

If the number of participants in Group 1 = 54 and the number in Group 2 = 58,what is the associated degrees of freedom?

Accepted Answer

A) 99 
B) 111 
C) 112 
D) 110 
A) 99 
B) 111 
C) 112 
D) 110

Question 3

What does the symbol t represent in the following: t(42)= 5.15,p < 0.01?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) probability 
A) test statistic 
B) t value 
C) degrees of freedom 
D) probability

Question 4

What does the number 58 represent in the following: t(58)= 2.001,p < 0.05?

Accepted Answer

A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level 
A) test statistic 
B) t value 
C) degrees of freedom 
D) significance level

Question 5

The test statistic calculated by the statistical procedure selected is known as the ______.

Accepted Answer

A) critical value 
B) significance level 
C) obtained value 
D) p value 
A) critical value 
B) significance level 
C) obtained value 
D) p value

Question 6

If the obtained t value is 7.14,and the critical value is 6.10,what decision should be made?

Accepted Answer

A) Accept the null hypothesis. 
B) Reject the null hypothesis. 
C) Rerun the analysis. 
D) Use a one-tailed test. 
A) Accept the null hypothesis. 
B) Reject the null hypothesis. 
C) Rerun the analysis. 
D) Use a one-tailed test.

Question 7

The t test for independent means is used when each group is tested ______.

Accepted Answer

A) once or twice 
B) only twice 
C) only once 
D) any number of times 
A) once or twice 
B) only twice 
C) only once 
D) any number of times

Question 8

In the effect size formula,what does ES stand for?

Accepted Answer

A) standard error of mean 
B) effect size 
C) standard deviation 
D) estimated sample size 
A) standard error of mean 
B) effect size 
C) standard deviation 
D) estimated sample size

Question 9

Which of the following is the formula used to calculate degrees of freedom for a t test?

Accepted Answer

A) n1 - 1 + n2 - 1 
B) n1 + n2 - 1 
C) n1 - 1 + n2 
D) n1 + n2 
A) n1 - 1 + n2 - 1 
B) n1 + n2 - 1 
C) n1 - 1 + n2 
D) n1 + n2

Question 10

A t test is conducted to detect differences between two groups in which participants are tested only once.

Accepted Answer

A) True 
 B)False

Question 11

To examine the difference among the average scores of three unrelated groups,which of the following statistical techniques should be selected?

Accepted Answer

A) regression 
B) dependent-samples t-test 
C) independent-samples t-test 
D) analysis of variance 
A) regression 
B) dependent-samples t-test 
C) independent-samples t-test 
D) analysis of variance

Question 12

If the number of participants in Group 1 = 32 and the number in Group 2 = 30,what is the associated degrees of freedom?

Accepted Answer

A) 58 
B) 59 
C) 60 
D) 62 
A) 58 
B) 59 
C) 60 
D) 62

Question 13

What is the t statistic value also known as?

Accepted Answer

A) critical value 
B) degrees of freedom 
C) obtained value 
D) test computation 
A) critical value 
B) degrees of freedom 
C) obtained value 
D) test computation

Question 14

Under what conditions would a researcher choose to use a t test for independent samples?

Accepted Answer

A researcher would choose the

Question 15

In order to compute the test statistic,or t value,you must first approximate the sample size by calculating the ______.

Accepted Answer

A) pooled variance 
B) standard deviation 
C) degrees of freedom 
D) mean score 
A) pooled variance 
B) standard deviation 
C) degrees of freedom 
D) mean score

Question 16

Which of the following is a major assumption of the t test regarding the amount of variability in each group?

Accepted Answer

A) variables normally distributed 
B) sample chosen at random 
C) scores are independent 
D) variances are equal 
A) variables normally distributed 
B) sample chosen at random 
C) scores are independent 
D) variances are equal

Question 17

In the t test for independent samples,the actual statistical test is ______.

Accepted Answer

A) nondirectional 
B) unidirectional 
C) multidirectional 
D) quasidirectional 
A) nondirectional 
B) unidirectional 
C) multidirectional 
D) quasidirectional

Question 18

The null hypothesis in an independent-samples t-test would be represented as follows:

Accepted Answer

A) H0: $\mu$1=$\mu$ 2 
B) H0:$\mu$1$\gt$$\mu$2 
C) H0: X1 = X2 
D) H1: X1 = X2 
A) H0: $\mu$1=$\mu$ 2 
B) H0:$\mu$1$\gt$$\mu$2 
C) H0: X1 = X2 
D) H1: X1 = X2

Question 19

When the obtained value is greater than the critical value,what should you do?

Accepted Answer

A) Reject the null hypothesis. 
B) Accept the null hypothesis. 
C) Set a higher p value. 
D) Increase the sample. 
A) Reject the null hypothesis. 
B) Accept the null hypothesis. 
C) Set a higher p value. 
D) Increase the sample.

Question 20

The SPSS output for an independent-samples t-test includes all but which of the following?

Accepted Answer

A) correlation coefficient 
B) standard deviation 
C) variance 
D) mean 
A) correlation coefficient 
B) standard deviation 
C) variance 
D) mean

A measure of the magnitude of the difference between two groups is _____.

If the number of participants in Group 1 = 54 and the number in Group 2 = 58,what is the associated degrees of freedom?

What does the symbol t represent in the following: t₍₄₂₎= 5.15,p < 0.01?

What does the number 58 represent in the following: t₍₅₈₎= 2.001,p < 0.05?

The test statistic calculated by the statistical procedure selected is known as the ______.

If the obtained t value is 7.14,and the critical value is 6.10,what decision should be made?

The t test for independent means is used when each group is tested ______.

In the effect size formula,what does ES stand for?

Which of the following is the formula used to calculate degrees of freedom for a t test?

A t test is conducted to detect differences between two groups in which participants are tested only once.

To examine the difference among the average scores of three unrelated groups,which of the following statistical techniques should be selected?

If the number of participants in Group 1 = 32 and the number in Group 2 = 30,what is the associated degrees of freedom?

What is the t statistic value also known as?

Under what conditions would a researcher choose to use a t test for independent samples?

In order to compute the test statistic,or t value,you must first approximate the sample size by calculating the ______.

Which of the following is a major assumption of the t test regarding the amount of variability in each group?

In the t test for independent samples,the actual statistical test is ______.

The null hypothesis in an independent-samples t-test would be represented as follows:

When the obtained value is greater than the critical value,what should you do?

The SPSS output for an independent-samples t-test includes all but which of the following?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters

Exam 11: Teafor Two: Tests Between the Means of Different Groups

A measure of the magnitude of the difference between two groups is _____.

If the number of participants in Group 1 = 54 and the number in Group 2 = 58,what is the associated degrees of freedom?

What does the symbol t represent in the following: t(42)= 5.15,p < 0.01?

What does the number 58 represent in the following: t(58)= 2.001,p < 0.05?

The test statistic calculated by the statistical procedure selected is known as the ______.

If the obtained t value is 7.14,and the critical value is 6.10,what decision should be made?

The t test for independent means is used when each group is tested ______.

In the effect size formula,what does ES stand for?

Which of the following is the formula used to calculate degrees of freedom for a t test?

A t test is conducted to detect differences between two groups in which participants are tested only once.

To examine the difference among the average scores of three unrelated groups,which of the following statistical techniques should be selected?

If the number of participants in Group 1 = 32 and the number in Group 2 = 30,what is the associated degrees of freedom?

What is the t statistic value also known as?

Under what conditions would a researcher choose to use a t test for independent samples?

In order to compute the test statistic,or t value,you must first approximate the sample size by calculating the ______.

Which of the following is a major assumption of the t test regarding the amount of variability in each group?

In the t test for independent samples,the actual statistical test is ______.

The null hypothesis in an independent-samples t-test would be represented as follows:

When the obtained value is greater than the critical value,what should you do?

The SPSS output for an independent-samples t-test includes all but which of the following?

Statistics or Sadistics Its up to You

Means to an End: Computing and Understanding Averages

Understanding Variability: Vive La Différence

A Picture Really Is Worth a Thousand Words

Computing Correlation Coefficients: Ice Cream and Crime

Understanding Reliability and Validity: Just the Truth

Hypotheticals and You: Testing Your Questions

Probability and Why It Counts: Fun With a Bell-Shaped Curve

Significantly Significant: What It Means for You and Me

Only the Lonely: the One Sample Z-Test

Teafor Two Again: Tests Between the Means of Related Groups

Two Groups Too Many Try Analysis of Variance

Two Too Many Factors: Factorial Analysis of Variancea Brief Introduction

Testing Relationships Using the Correlation Coefficients: Cousins or Just Good Friends

Using Linear Regression: Predicting Wholl Win the Super Bowl

Chi-Square and Some Other Nonparametric Tests: What to Do When Youre Not Normal

Some Other Importantstatistical Procedures You Should Know About

An Introduction to Data Mining

Filters

What does the symbol t represent in the following: t₍₄₂₎= 5.15,p < 0.01?

What does the number 58 represent in the following: t₍₅₈₎= 2.001,p < 0.05?