CNSL 503 Module 6 problem set UPDATED ACTUAL
QUESTIONS AND CORRECT Answers
What does ANOVA stand for? Analysis of variance
When is it appropriate to use an ANOVA? When a dataset is made up of three or more groups.
Which of the following is a TRUE statement regarding an The F ratio compares the variance within samples to the variance between samples.
ANOVA? 3 multiple choice options
The ________ determines the type of ANOVA to run on a number of factors (independent variables)
dataset.
Which of the following items are needed in order to locate dfbn,dfwn,significance level
the critical value for an ANOVA using the table? Select all
that apply.
True or False: An economist wants to compare the mean False
annual income of employees at four Fortune 500 An ANOVA can be used for research designs with three or more groups.
companies. Analysis of variance cannot be used because
there are more than three populations.
Samples of theme park wait times are obtained and Ho: All five theme parks have the same mean wait times.
compared. Five major theme parks are compared, and Ha: At least one of the five theme parks has a mean wait time that is different from
their mean wait times are recorded. Identify the null the others.
hypothesis and alternative hypotheses for applying an
analysis of variance.
What does an F-value below 1 indicate? What does an F- Answer: A small F (F < 1) indicates that the variation within the groups is greater
value above 1 mean? than the variation between group means. In contrast, a large F (F > 1) indicates
that the variation between the group means is greater than the variation within
the groups. The greater the value of F, the more likely it is that a true difference
exists between the group means.
Which of the following is used to measure effect size for an Eta squared
ANOVA?
What is another name for effect size in an ANOVA? Proportion of variance accounted for
Why are post hoc tests run in conjunction with an ANOVA? Answer: The results of an ANOVA only provide evidence of whether or not at least
one mean is different in a sample of three or more means. The results do not
indicate where the difference actually exists. Therefore, post hoc tests are used to
determine where specific differences exist.
QUESTIONS AND CORRECT Answers
What does ANOVA stand for? Analysis of variance
When is it appropriate to use an ANOVA? When a dataset is made up of three or more groups.
Which of the following is a TRUE statement regarding an The F ratio compares the variance within samples to the variance between samples.
ANOVA? 3 multiple choice options
The ________ determines the type of ANOVA to run on a number of factors (independent variables)
dataset.
Which of the following items are needed in order to locate dfbn,dfwn,significance level
the critical value for an ANOVA using the table? Select all
that apply.
True or False: An economist wants to compare the mean False
annual income of employees at four Fortune 500 An ANOVA can be used for research designs with three or more groups.
companies. Analysis of variance cannot be used because
there are more than three populations.
Samples of theme park wait times are obtained and Ho: All five theme parks have the same mean wait times.
compared. Five major theme parks are compared, and Ha: At least one of the five theme parks has a mean wait time that is different from
their mean wait times are recorded. Identify the null the others.
hypothesis and alternative hypotheses for applying an
analysis of variance.
What does an F-value below 1 indicate? What does an F- Answer: A small F (F < 1) indicates that the variation within the groups is greater
value above 1 mean? than the variation between group means. In contrast, a large F (F > 1) indicates
that the variation between the group means is greater than the variation within
the groups. The greater the value of F, the more likely it is that a true difference
exists between the group means.
Which of the following is used to measure effect size for an Eta squared
ANOVA?
What is another name for effect size in an ANOVA? Proportion of variance accounted for
Why are post hoc tests run in conjunction with an ANOVA? Answer: The results of an ANOVA only provide evidence of whether or not at least
one mean is different in a sample of three or more means. The results do not
indicate where the difference actually exists. Therefore, post hoc tests are used to
determine where specific differences exist.
