Question 1

The subtraction order in an independent samples t-test is not important.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following is an example of repeated measures data?

Accepted Answer

A)  sales figures this year and last year 
B)  yearly performance evaluations over the past three years 
C)  employee turnover for the past five years 
D)  all of these 
A)  sales figures this year and last year 
B)  yearly performance evaluations over the past three years 
C)  employee turnover for the past five years 
D)  all of these

Question 3

If your dataset contains twenty scores, the degrees of freedom for your independent samples t-test will be ______.

Accepted Answer

A)  20 
B)  19 
C)  18 
D)  38 
A)  20 
B)  19 
C)  18 
D)  38

Question 4

Given a particular dataset, how would you determine if a paired samples or an independent samples t-test were appropriate?

Accepted Answer

A paired samples t-test would be appropr

Question 5

The sample estimate of µD is ______.

Accepted Answer

A)  sD 
B)  x? 
C)  x? D 
D)  ${ }^{s_{D_{\bar{x}}}}$ 
A)  sD 
B)  x? 
C)  x? D 
D)  ${ }^{s_{D_{\bar{x}}}}$

Question 6

The parameter of interest in an independent samples t-test is ______.

Accepted Answer

A)  µ 
B)  µD 
C)  µ1 - µ2 
D)  none of these 
A)  µ 
B)  µD 
C)  µ1 - µ2 
D)  none of these

Question 7

All repeated measures data are also paired data

Accepted Answer

A) True 
 B)False

Question 8

The order of mean subtraction for the independent samples t-test is dependent on ______.

Accepted Answer

A)  the phrasing of the research question 
B)  the direction of the critical value 
C)  the sign used in the hypotheses 
D)  all of these 
A)  the phrasing of the research question 
B)  the direction of the critical value 
C)  the sign used in the hypotheses 
D)  all of these

Question 9

When conducting a paired samples test on Time 1 and Time 2 data, it is clearest to subtract Time 2 from Time 1.

Accepted Answer

A) True 
 B)False

Question 10

You collect a sample of ten pairs of pre- and post-training test scores. If D = 1.1 and sD = 1.37, what is the observed value of t?

Accepted Answer

A)  2.539 
B)  1.833 
C)  .80 
D)  none of these 
A)  2.539 
B)  1.833 
C)  .80 
D)  none of these

Question 11

When asking if there is a difference in a paired samples test, the value of µD is always 0.

Accepted Answer

A) True 
 B)False

Question 12

When calculating paired samples t-test, we should always compute a confidence interval.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is most likely what µ1 - µ2 represents?

Accepted Answer

A)  the hypothesized mean difference in the population 
B)  the hypothesized mean difference in the sample 
C)  the standard error 
D)  none of these 
A)  the hypothesized mean difference in the population 
B)  the hypothesized mean difference in the sample 
C)  the standard error 
D)  none of these

Question 14

We must calculate the pooled variance because ______.

Accepted Answer

A)  we need to compute a standard error for each sample 
B)  we need to compute a single standard error for two samples 
C)  we do not have information about the variance of each sample 
D)  all of these 
A)  we need to compute a standard error for each sample 
B)  we need to compute a single standard error for two samples 
C)  we do not have information about the variance of each sample 
D)  all of these

Question 15

You collect information about the number of employees that arrive to work late. Employees are categorized in two groups: those hired more than 6 months ago (Group 1) and those hired less than 6 months ago (Group 2). You hypothesize that employees that were hired more than 6 months ago will have lower mean days late than those hired less than six months ago. If x̄1 = 1.8, x̄2 = 3.5, s1 = 0.78811 and s2 = 0.707107, what is the appropriate conclusion if F1F1F1S1F1F1F10 = .05?

Accepted Answer

A)  retain the null 
B)  reject the alternative 
C)  reject the null none of these 
A)  retain the null 
B)  reject the alternative 
C)  reject the null none of these

Question 16

Which of the following is an example of paired data?

Accepted Answer

A)  two employees 
B)  an employee and their immediate supervisor 
C)  two supervisors 
D)  all of these 
A)  two employees 
B)  an employee and their immediate supervisor 
C)  two supervisors 
D)  all of these

The subtraction order in an independent samples t-test is not important.

Which of the following is an example of repeated measures data?

If your dataset contains twenty scores, the degrees of freedom for your independent samples t-test will be ______.

Given a particular dataset, how would you determine if a paired samples or an independent samples t-test were appropriate?

The sample estimate of µ_Dis ______.

The parameter of interest in an independent samples t-test is ______.

All repeated measures data are also paired data

The order of mean subtraction for the independent samples t-test is dependent on ______.

When conducting a paired samples test on Time 1 and Time 2 data, it is clearest to subtract Time 2 from Time 1.

You collect a sample of ten pairs of pre- and post-training test scores. If _D = 1.1 and s_D = 1.37, what is the observed value of t?

When asking if there is a difference in a paired samples test, the value of µ_D is always 0.

When calculating paired samples t-test, we should always compute a confidence interval.

Which of the following is most likely what µ₁- µ₂ represents?

We must calculate the pooled variance because ______.

Which of the following is an example of paired data?

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

Exam 9: Tests for Significance: Paired and Independent-Samples T-Test

The subtraction order in an independent samples t-test is not important.

Which of the following is an example of repeated measures data?

If your dataset contains twenty scores, the degrees of freedom for your independent samples t-test will be ______.

Given a particular dataset, how would you determine if a paired samples or an independent samples t-test were appropriate?

The sample estimate of µD is ______.

The parameter of interest in an independent samples t-test is ______.

All repeated measures data are also paired data

The order of mean subtraction for the independent samples t-test is dependent on ______.

When conducting a paired samples test on Time 1 and Time 2 data, it is clearest to subtract Time 2 from Time 1.

You collect a sample of ten pairs of pre- and post-training test scores. If D = 1.1 and sD = 1.37, what is the observed value of t?

When asking if there is a difference in a paired samples test, the value of µD is always 0.

When calculating paired samples t-test, we should always compute a confidence interval.

Which of the following is most likely what µ1 - µ2 represents?

We must calculate the pooled variance because ______.

Which of the following is an example of paired data?

The Language of Statistics

Working With Numbers and Data Display

Central Tendency and Variability

Probability Distributions

Sampling Distributions

Estimation and Confidence Intervals

Hypothesis Testing

Tests for Significance: Z-Tests and One-Sample T-Tests

Analysis of Variance Anova

CHI-Squared Tests of Fit

Correlation R and Regression Y BX A

Matching Statistical Tests to Business Problems

Filters

The sample estimate of µ_Dis ______.

You collect a sample of ten pairs of pre- and post-training test scores. If _D = 1.1 and s_D = 1.37, what is the observed value of t?

When asking if there is a difference in a paired samples test, the value of µ_D is always 0.

Which of the following is most likely what µ₁- µ₂ represents?