Question 2: Love you, love you not . (20 points)

Description : An experiment was run on changes in people’s self body-image as a result of their environments being manipulated. The experimenters manipulated two variables ("mirrors" and "dress style"), and measured their combined effects on self body-image, using a questionnaire given at the end of 6-months of treatment.

Number of cases : 36

Variable Names :

1. Mirrors: How many mirrors are placed in your residence (either "none" or "lots")?
2. Dress style: The kind of clothing you are permitted to wear during the experiment ("baggy," "a bit tight," or "very, very tight").
3. Self: Ratings of body-image (high scores suggest satisfaction with body image).

Problems:

1. Run an analysis to examine the effects of each variable in isolation and in combination with the other. Is the homogeneity of variance assumption violated or not? Summarize the findings for this analysis (make sure you mention the meaningfulness of the effects as well as their significance), performing follow-up tests on the statistical effects where necessary, and state the significant differences you find. Interpret these differences, if any. Which effect(s) should be paid most attention to, and why? ( 15 points )
2. Why might you obtain a significant effect from an analysis of variance, yet not obtain any significant differences from a follow-up test? ( 5 points )

Question 4: Hot dogs, lovely hot dogs (20 points)

Description : Calorie and sodium content of major hot dog brands across three types of hot dog: beef, poultry, and meat (mixture of pork, beef, and poultry).

Number of cases : 51

Variable Names :

1. Type: Type of hotdog (beef, meat, or poultry)

2. Calories: Calories per hot dog

3. Sodium: Milligrams of sodium per hot dog

Problems:

1. Imagine you are on a calorie-controlled diet, but are also an unfortunate product of the modern junk food crazed generation, and cannot live without hot dogs. Which hot dog variety might you choose to eat to reduce your calorie intake? What is the meaningfulness of the difference between this hot dog and each of the other two? Report the findings of the statistical analysis as per Cronk. ( 15 points )
2. Now imagine that your health concern is sodium intake. Now what would be your choice? Again, justify your choice with appropriate statistical evidence. ( 5 points )
   Question 5: Juggling (20 points)
   Description : Four methods of Juggling were compared, in order to make recommendations about the best method one could use to learn the skill. Methods of Juggling were, with scarves, with scarves with pennies tied in, with tennis balls, and with juggling balls. After two weeks, all participants tried to juggle with tennis balls. The average number of consecutive catches with the tennis balls was recorded as evidence of the best method practice.
   Number of cases : 44
   Variable Names :
   1. Method of Juggling (scarves, scarves w/pennies, tennis balls, juggling balls).
   2. Average number of consecutive catches made after two weeks of practice.

Problems:

1. Conduct the appropriate analysis to examine group differences among these learning groups. Report the outcome of the analysis as per Cronk, and on the basis of this recommend one or more of the learning methods, including in your statement a comment about the meaningfulness of the difference between the leading group(s) and the other(s). Include in your recommendation any statements about cautions applied to the results due to violations of assumptions ( 10 points ).
2. Create a new variable that is equal to the square root of the dependent variable in the analysis conducted in (i). Repeat the analysis. Has your recommendation changed? If so, state your new recommendation. ( 5 points )
3. Do you trust the outcomes of the analysis conducted in (i) or (ii) more? Why? ( 5 points )

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Solution: The downloadable solution consists of 17 pages, 1372 words and 22 charts.
Deliverable: Word Document