Problem Set 1: The paired-samples t test

Research Scenario: A sports psychologist is studying the efficacy of a new public school health program on the number of minutes 10^th graders exercise per week. She surveys a sample of 10^th graders before the program begins and records the number of minutes they report exercising per week. After two months in the program, the students are surveyed again. The data are listed in the table below.

Using this table, enter the data into a new SPSS data file and run a paired-samples t test to test the claim that the new health program significantly increases the number of minutes exercised per week. Follow the directions below the table to complete the homework.

Minutes Ex. / Week Before Program Minutes Ex. / Week After Program

45 50

47 50

50 60

55 75

40 60

42 55

60 60

55 80

35 45

50 60

1.Paste SPSS output.(7 pts)

2.Write Results section based on your analysis. Include your boxplot as a figure as demonstrated in the APA writing presentation. (Results = 8 pts; Graph = 5 pts)

Problem Set 2: The paired-samples t test

Research Scenario: A social psychologist is studying the differences in the number of Facebook friends between identical twins raised apart. She believes that twins raised in different environments will have differences in the number of friends, which would help point to the influence of environmental factors over inherited factors on social outcomes. She divides the twins into two groups ("Twin 1" and "Twin 2"), collects the data and creates the table below.

Using this table, enter the data into a new SPSS data file and run a paired-samples t test to test the claim that the identical twins raised apart will have a different number of Facebook friends. Follow the directions below the table to complete the homework.

Twin 1 Twin 2

284 198

34 116

19 119

78 43

89 90

196 180

47 61

207 112

87 100

93 87

129 126

19 52

11 56

212 259

154 70

58 48

1.Paste SPSS output.(7 pts)

2.Write Results section based on your analysis. Include your boxplot as a figure as demonstrated in the APA writing presentation. (Results = 8 pts; Graph = 5 pts)