(Lesson 25) The data for Exercises 1 through 3 are in the data set named Lesson 25 Exercise File 1 on the Web at http://www.pearsonhighered.com/greensalkindSPSS. The data are from the following research problem.
Marvin is interested in whether blonds, brunets, and redheads differ with respect to their extrovertedness. He randomly samples 18 men from his local college campus: six blonds, six brunets, and six redheads. He then administers a measure of social extroversion to each individual.
- Conduct a one-way ANOVA to investigate the relationship between hair color and social extroversion. Be sure to conduct appropriate post hoc tests. On the output, identify the following:
a.
F ratio for the group effect
b. Sums of squares for the hair color effect
c. Mean for redheads
d.
p value for the hair color effect
- What is the effect size for the overall effect of hair color on extroversion?
- Create a boxplot to display the differences among the distributions for the three hair color groups.
(Lesson 26) Exercises
5 through 8 are based on the following research problem. The data set for this problem is named
Lesson 26 Exercise File 2 on the Web at http://www.pearsonhighered.com/ greensalkindSPSS.
Vicki was interested in how much time fathers of children with a disability play with their children. To address this question, she found 60 fathers in six categories:
- fathers with a boy with no physical or intellectual disability
- fathers with a girl with no physical or intellectual disability
- fathers with a boy with a physical disability
- fathers with a girl with a physical disability
- fathers with a boy with an intellectual disability
- fathers with a girl with an intellectual disability.
She asked fathers to record how many 10-minute segments per day they spent playing with their child for five days. The SPSS data file contains 60 cases and three variÂables, a factor indicating the disability status of the child, a factor indicating the child's gender, and a play time score averaged across the five days.
- Conduct a two-way ANOVA to evaluate differences among the groups, according to gender and disability status of the child, in the amount of time fathers spent playing with their children.
- Which follow-up procedures should you use? Why?
- Write a Results section reporting the results of the analysis.
- Create a box plot to show the distributions for the six groups.