Posted: April 6th, 2017
What are the means for three groups’ hours worked on a job?
Questions to Be Graded
Name :___________________________ Class: _________________________________ Date:____________________________________________________________________
Follow your instructor’ s directions to submit your answers to the following questions for grading. Your instructor may ask you to write your answers below and submit them as a hard copy for grading. Alternatively, your instructor may ask you to use the space below for notes and submit your answers online at http://evolve.elsevier.com/Grove/statistics/ under “Questions to Be Graded.”
- Do the data meet criteria for homogeneity of variance? Provide a rationale for your answer.
- If calculating by hand, draw the frequency distribution of the dependent variable, hours worked at a job. What is the shape of the distribution? If using SPSS, what is the result of the Shapiro-Wilk test of normality for the dependent variable?
- What are the means for three groups’ hours worked on a job?
- What are the F value and the group and error df for this set of data? Name: __
- Is the F signiﬁcant at α = 0.05? Specify how you arrived at your answer.
- If using SPSS, what is the exact likelihood of obtaining an F value at least as extreme as or as close to the one that was actually observed, assuming that the null hypothesis is true?
- Which group worked the most weekly job hours’ post-treatment? Provide a rationale for your answer.
- Write your interpretation of the results as you would in an APA-formatted journal.
- Is there a difference in your ﬁnal interpretation when comparing the results of the LSD post hoc test versus Tukey HSD test? Provide a rationale for your answer.
- If the researcher decided to combine the two Treatment as Usual groups to represent an overall “Control” group, then there would be two groups to compare: Supported Employment versus Control. What would be the appropriate statistic to address the difference in hours worked between the two groups? Provide a rationale for your answer.
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