Question 1

In an ANOVA test of the differences between the means of three groups, the null hypothesis is _____.

Accepted Answer

A)  m1 = m2 = m3 
B)  m1 ¹ m2 ¹ m3 
C)  m1 - m2 - m3 = 0 
D)  m1 + m2 + m3 = 1 
A)  m1 = m2 = m3 
B)  m1 ¹ m2 ¹ m3 
C)  m1 - m2 - m3 = 0 
D)  m1 + m2 + m3 = 1

Question 2

In practice, computer software is used to compute the t-test results.

Accepted Answer

A) True 
 B)False

Question 3

Which test is appropriate for comparing the scores of two interval variables drawn from related populations?

Accepted Answer

A)  ANOVA 
B)  relative t-test 
C)  relative c2 test 
D)  pair-samples t-test 
A)  ANOVA 
B)  relative t-test 
C)  relative c2 test 
D)  pair-samples t-test

Question 4

Suppose that you used a 9-point rating scale and that you wanted to compare men who had an annual income over $50,000 (Group 1) with men who had an annual income less than or equal to $50,000 (Group 2) on their liking of a new product. If you studied 40 men in Group 1 and they have a mean of 7 and a standard deviation of 2.5, while the 35 men in Group 2 have a mean of 5 and a standard deviation of 1.4, what is the approximate value of t using the t-test?

Accepted Answer

A)  3.43 
B)  4.19 
C)  2.64 
D)  not enough information to determine 
A)  3.43 
B)  4.19 
C)  2.64 
D)  not enough information to determine

Question 5

Discuss the factors that influence the statistical choice. If a researcher is examining factors that influence an automobile's gas mileage, which statistical tool (or tools) is appropriate?

Accepted Answer

The factors that influence the statistic

Question 6

The _____ is the mean of a variable over all observations.

Accepted Answer

The answer of The _____ is the mean of a...

Question 7

All of the following are true regarding cross-tabulation EXCEPT _____.

Accepted Answer

A)  The c2 distribution provides a means for testing the statistical significance of a contingency table. 
B)  The c2 for a contingency table compares two means that are not from independent samples. 
C)  Cross-tabulations are much like tallying. 
D)  The c2 test for a contingency table involves comparing the observed frequencies with the expected frequencies in each cell of the table. 
A)  The c2 distribution provides a means for testing the statistical significance of a contingency table. 
B)  The c2 for a contingency table compares two means that are not from independent samples. 
C)  Cross-tabulations are much like tallying. 
D)  The c2 test for a contingency table involves comparing the observed frequencies with the expected frequencies in each cell of the table.

Question 8

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

Accepted Answer

A) True 
 B)False

Question 9

The _____ is an estimate of the standard error for a t-test of independent means that assumes the variances of both groups are equal.

Accepted Answer

pooled est

Question 10

Which of the following is the sum of differences between the group mean and the grand mean summed over all groups for a given set of observations?

Accepted Answer

A)  between-groups variance 
B)  total error variance 
C)  F-statistic 
D)  c2 value 
A)  between-groups variance 
B)  total error variance 
C)  F-statistic 
D)  c2 value

Question 11

An appropriate test for comparing the scores of two interval variables drawn from related populations is the _____.

Accepted Answer

paired-sam

Question 12

_____ involves the investigation of the effects of one treatment variable on an interval-scaled dependent variable and determines whether statistically significant differences in means occur between two or more groups.

Accepted Answer

A)  Analysis of variance (ANOV
A)  
B)  Regression analysis 
C)  Cross-tabulation 
D)  c2 
A)  Analysis of variance (ANOV
A)  
B)  Regression analysis 
C)  Cross-tabulation 
D)  c2

Question 13

In order to use the chi-square test, the expected frequency in each of the cells of the contingency table should be at least _____.

Accepted Answer

A)  2 
B)  5 
C)  30 
D)  40 
A)  2 
B)  5 
C)  30 
D)  40

Question 14

The F-test partitions total variance into ______ variance and ______ variance.

Accepted Answer

within-gro

Question 15

In a brand awareness study, if 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females identify this brand correctly, the chi-square value for this study is approximately _____.

Accepted Answer

A)  3.26 
B)  4.15 
C)  5.84 
D)  2.92 
A)  3.26 
B)  4.15 
C)  5.84 
D)  2.92

Question 16

how do you determine the degrees of freedom in a four-cell chi-square test?

Accepted Answer

A)  (R + 1) 
B)  (R - 1) 
C)  (R - 1)(C - 1) 
D)  R(C - 1) 
A)  (R + 1) 
B)  (R - 1) 
C)  (R - 1)(C - 1) 
D)  R(C - 1)

Question 17

The mean of a variable over all observations is called the _____.

Accepted Answer

A)  master mean 
B)  average mean 
C)  grand mean 
D)  ANOVA mean 
A)  master mean 
B)  average mean 
C)  grand mean 
D)  ANOVA mean

Question 18

When no direction of a relationship is stated in the hypothesis, a one-tailed test is appropriate.

Accepted Answer

A) True 
 B)False

Question 19

Discuss when a paired-samples t-test is appropriate and give an example of when it should be used.

Accepted Answer

A paired-samples t-test is an appropriat

Question 20

The total mean is the mean of a variable over all observations.

Accepted Answer

A) True 
 B)False

Exam 22: Bivariate Statistical Analysis: Differences Between Two Variables

In an ANOVA test of the differences between the means of three groups, the null hypothesis is _____.

In practice, computer software is used to compute the t-test results.

Which test is appropriate for comparing the scores of two interval variables drawn from related populations?

Discuss the factors that influence the statistical choice. If a researcher is examining factors that influence an automobile's gas mileage, which statistical tool (or tools) is appropriate?

The _____ is the mean of a variable over all observations.

All of the following are true regarding cross-tabulation EXCEPT _____.

The chi-square test requires that the expected frequency in each cell of the contingency table be at least 30.

The _____ is an estimate of the standard error for a t-test of independent means that assumes the variances of both groups are equal.

Which of the following is the sum of differences between the group mean and the grand mean summed over all groups for a given set of observations?

An appropriate test for comparing the scores of two interval variables drawn from related populations is the _____.

_____ involves the investigation of the effects of one treatment variable on an interval-scaled dependent variable and determines whether statistically significant differences in means occur between two or more groups.

In order to use the chi-square test, the expected frequency in each of the cells of the contingency table should be at least _____.

The F-test partitions total variance into ______ variance and ______ variance.

In a brand awareness study, if 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females identify this brand correctly, the chi-square value for this study is approximately _____.

how do you determine the degrees of freedom in a four-cell chi-square test?

The mean of a variable over all observations is called the _____.

When no direction of a relationship is stated in the hypothesis, a one-tailed test is appropriate.

Discuss when a paired-samples t-test is appropriate and give an example of when it should be used.

The total mean is the mean of a variable over all observations.

The Role of Business Research

Information Systems and Knowledge Management

Theory Building

The Business Research Process

The Human Side of Business Research: Organizational and Ethical Issues

Problem Definition: the Foundation of Business Research

Qualitative Research

Secondary Data Research in a Digital Age

Survey Research: an Overview

Survey Research: Communicating With Respondents

Observation

Experimental Research

Measurement

Attitude Measurement

Questionnaire Design

Sampling Designs and Sampling Procedures

Determination of Sample Size: a Review of Statistical Theory

Fieldwork

Editing and Coding: Transforming Raw Data Into Information

Basic Data Analysis: Descriptive Statistics

Univariate Statistical Analysis

Bivariate Statistical Analysis: Measures of Association

Multivariate Statistical Analysis

Communicating Research Results: Report Generation, Oral Presentation, and Follow-Up

Filters

The F-test partitions total variance into variance and variance.