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1) Which sample has more variability? Explain

a) 1, 3, 6, 13, 14, 21

b) 1, 4, 7, 12, 13, 21

2) Sam made a 61 and Bob made a 68. If the mean was 65, which SD would Bob prefer: SD = 1, SD = 5, SD = 10? Explain

3) Same people, same scores, same mean. Which SD would Sam prefer: SD = 1, SD = 5, SD = 10? Explain

4) Below is a set of data collected from students in an experiment. Between what scores would we expect to find 95% of the data? Explain

3 7 11 8

11 12 9 5

6 9 5 11

The next question requires SPSS please look at the attached file to answer the question.

1) What is the dependent variable?What is the sample size of the data? What is the range of the data?What is variance for this data?What is standard deviation for this data?

1) The following 25 scores are from students that participated in a psychology experiment. The scores represent the number of trials required to master a memory task. What is the range, mean, variance, and standard deviation for this dataset?

12 10 12 11 6

15 14 17 9 12

13 8 7 15 14

15 18 19 14 10

14 14 16 8 9

2) Suppose we add 8 to each score above. What is the range, mean, variance, and standard deviation?

3) Suppose we double each score. What is the range, mean, variance, and standard deviation?

4) On an exam with a mean of 75, you score an 80. Would you be in a better position if SD = 2 or SD = 10? Explain

5) What if you made a 70 instead of an 80? would you be in a better position if SD = 2 or SD = 10? Explain

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