Part 1

1. A health psychologist is interested in the effects of exercise on stress in people who regularly exercise. Specifically, she is interested in the type of exercise as well as the time of day that the individual exercises. She recruits participants from a local health club who regularly participate in one of three types of exercise: swimming, aerobics, and tennis. She further divides these participants by whether they exercise in the morning or the evening. She then administers a questionnaire to each individual assessing their self-reported stress level. A higher score indicates higher levels of stress. Conduct a two-way ANOVA to analyze these data. Use Fisher’s LSD as well as Tukey’s tests in order to conduct any necessary post hoc analyses if there are significant main effects or interactions.
   The steps will be the same as the ones you have been practicing in Part One of the assignment—the only difference is that you are now responsible for creating the data file as well. Remember to name and define your variables under the "Variable View," then return to the "Data View" to enter the data.
   
2. What are the F and p values for the Type of Exercise main effect?
3. Is there an interaction effect?
4. Based on your results, is there one type of exercise that seems more effective in reducing stress than the others?

2. An experimenter wanted to investigate simultaneously the effects of two types of reinforcement schedules and three types of reinforcers on the arithmetic problem-solving performance of second-grade students. A sample of 66 second graders was identified, and 11 were randomly assigned to each of the six combinations of reinforcement schedules and reinforcers. Students studied arithmetic problem solving under these six conditions for three weeks, and then took a test on the material they studied. The SPSS data file includes 66 cases and three variables: a factor distinguishing between the two types of reinforcement schedules (random or spaced), a second factor distinguishing among three types of reinforcers (token, money, or food), and the dependent variable, an arithmetic problem-solving test.

Conduct a two-way ANOVA to analyze these data.

1. Identify the following information from the output: a. F value for the schedule main effect b. Mean GPA dependent variable score for the cell associated with the random
   schedule and the money reinforcer c. Effect size for the interaction effect d. p value for the reinforcer type main effect
2. What follow-up tests would you conduct? Why?
3. Write a Results section based on your output.
4. Create a boxplot to visually represent the interaction between schedule type and reinforcer type on test scores.

Part 2

The following research questions can be answered using one of the five tests: single-sample t-test, paired-samples t-test, independent-samples t-test, one-way ANOVA, or two-way ANOVA. For each problem involving a test of significance, the answer should include: A) the output and an appropriate graph from SPSS;B) a statistical statement (i.e. t(19) = 1.79, p = .049); and C) an APA sentence summarizing the results (i.e. "There was a significant difference between the two groups on the variable…" or "There was no significant difference…." etc.). For ANOVA problems: Report statistical findings and make statements for all main effects and interaction effects. Use the Fisher LSD test for any analyses requiring post hoc tests.

1. An entrepreneur claims that he has developed a program that can increase the IQ of adolescent students. To test this claim a psychologist administers the WISC (an IQ score for children) to a group of students before and after completing the training program. Analyze the data to test the entrepreneur’s claim.
   
2. The staff at a local psychiatric facility wants to determine whether implementing a no-smoking rule significantly decreases the length of stay of inpatients. In order to test this claim, they compared the length of stay of patients admitted before a No Smoking rule was implemented to another group of patients admitted after the No Smoking rule. Evaluate the claim that the average length of stay was significantly shorter for the group admitted after the facility implemented the rule.
   
3. Depressed patients are randomly assigned to one of 3 therapists. At the end of 3 months, each patient completes a standardized test of depression (higher scores indicate higher level of depression). The patients’ scores are shown below. Analyze the data to determine how effective these 3 therapists are at treating depression (assume that before the treatment, all 3 groups of patients had the same average depression score).
   
4. In light of all the weight loss misinformation and fad diets, a medical researcher determines to evaluate several of them. She randomly assigns volunteers (identified as clinically obese) to one of 4 diets. She is a firm believer in the benefits of exercise so she also assigns them to either the exercise or no exercise group. After 3 months, she compares the pounds lost for each condition. Was there a significant effect of the diets and exercise on weight loss?
   
5. Infants exposed to cocaine in their mother’s womb are thought to be at high risk for major birth defects. Thirteen infants born to mothers who are addicted to cocaine are administered the Brazelton Neonatal Assessment one day after birth. For these babies, their scores were as follows

For the general population, babies normally score an 8.5. Is this group of babies significantly lower than normal?

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Solution: The downloadable solution consists of 23 pages, 1753 words and 32 charts.
Deliverable: Word Document