Part One:

Note: For the two-wayANOVA, you will be expected to create a line graph as covered in the SPSStutorial in the Course Content (and not a boxplot as in the textbook). Thisapplies to future cumulative questions as well.

Green & Salkind:Lesson 26, Exercises 1, 4, 5, 6, 7, and 8

The following helpful tips are numbered to correspond withthe exercise number to which they refer (a dash indicates that no tips areneeded):

1. Instead of identifying these values on your output, asthe text states, please write them into your Word file as written answers for #1 a, b, c, and d. (2 pts for output; a-d = 2pts each)

4. Produce a linegraph instead of a boxplot for this problem. Follow directions in courseSPSS tutorial for setting up a line graph. (2 pts)

5. ——-  (2 pts)

6. ——-  (2 pts)

7. All homework “Results sections” should follow theexample given in the Course Content document “Writing Results of StatisticalTests in APA Format” (note: you do not have to refer to a figure). (2 pts)

8. Produce a linegraph instead of a boxplot for this problem. Follow directions in courseSPSS tutorial for setting up a line graph. (2 pts)

Part Two:

1. A health psychologist is interested in the effects ofexercise on stress in people who regularly exercise. Specifically, she isinterested in the type of exercise as well as the time of day that theindividual exercises. She recruits participants from a local health club whoregularly participate in one of three types of exercise:  swimming, aerobics, and tennis. She furtherdivides these participants by whether they exercise in the morning or theevening. She then administers a questionnaire to each individual assessingtheir self-reported stress level. (HIGHER SCORE = HIGHER STRESS). Conduct a two-way ANOVA to analyze these data.Use Tukey’s test in order to conduct any necessary post hoc analyses if thereare significant main effects. You do not have to follow up on significantinteractions at this time.

The steps will be the same as theones you have been practicing in Part One of the assignment—the only differenceis that you are now responsible for creating the data file as well. Remember toname and define your variables under the “Variable View,” then return to the“Data View” to enter the data. (2 pts for output, – 1 pt if no post hoc)

Morning

Swimming

Aerobics

Tennis

10

16

12

16

9

19

21

16

18

17

21

18

14

Evening

14

13

8

12

12

17

12

14

9

10

12

15

19

14

2. Write an APA-style results section describing theoutcome. All homework “Results sections” should follow the example given in theCourse Content document “Writing Results of Statistical Tests in APA Format”(note: you do not have to refer to a figure). For the two-way ANOVA, be sure toinclude statistical statements concerning the F ratios and p values for bothmain effects and the interaction, and interpretation statements about all 3 ofthese effects. (2 pts)

3. Is there a significant interaction effect? (2 pts)

4. Based on your results, is there one type of exercisethat seems more effective in reducing stress than the others? Remember thathigher scores = higher stress. (2 pts)

This assignment is due by 11:59 p.m. (ET) on Monday ofModule/Week 4.

Part Three:  Cumulative Homework

1.  An investigator in child development researchis studying the development of object permanence – the understanding that anobject still exists even if its out of sight. She tests three groups of infants– ten who are 9 months old, 8 who are 12 months old, and 10 who are 15 monthsold. She presents each of the infants with 10 trials. On each trial, a toy isfirst shown to the child and then covered with a piece of cloth. The infantdemonstrates object permanence if he or she looks for the object when it’scovered. Each infant is given a score for the number of trials (out of 10) onwhich he or she shows object permanence. Is there a significant differencebetween the groups on demonstrations of object permanence? Choose the correcttest to analyze this question, set up the SPSS file, and run the analysis.Follow the directions under the table below.

9 Months

8, 3, 4, 6, 5, 4, 9, 2, 0, 1

12 Months

10, 5, 6, 7, 6, 5, 10, 3

15 Months

10, 8, 9, 9, 8, 7, 9, 6, 6, 8

a) Paste appropriate SPSS output. (2 pts)

b) Paste appropriate SPSS graph. (2 pts)

c) Write an APA-style results section describing theoutcome. All homework “Results sections” should follow the example given in theCourse Content document “Writing Results of Statistical Tests in APA Format”(note: you do not have to refer to a figure). (2 pts)

2. A researcher wanted to investigate whether there was adifference in satisfaction ratings in an assisted living facility betweenresidents who had a pet with them vs. those who did not have a pet.  She administered a scale asking them to ratetheir overall satisfaction with the facility. Did having a pet have an impact on the residents’ overall satisfactionlevels? Choose the correct test to analyze this question, set up the SPSS file,and run the analysis. Follow the directions under the table below (on nextpage).

Pet

47

42

35

46

49

39

40

46

52

40

No Pet

30

25

24

42

28

25

a) Paste appropriate SPSS output. (2 pts)

b) Paste appropriate SPSS graph. (2 pts)

c) Write an APA-style results section describing theoutcome. All homework “Results sections” should follow the example given in theCourse Content document “Writing Results of Statistical Tests in APA Format”(note: you do not have to refer to a figure). (2 pts)

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