solution

Use SPSS to compute z scores for the distance scores given in Chapter 5, Problem 20, p. 118 in the textbook. Compare your answer with that given in Appendix C for this problem. Name the scores Distance.

Problem 20

A jogging enthusiast keeps track of how many miles he jogs each week. The following scores are sampled from his year 2007 records:

a. Determine the z scores f or the distances shown in the table. Note that the distances are sample scores.

b. Plot a frequency polygon for the raw scores.

c. On the same graph, plot a frequency polygon for the z scores.

d. Is the z distribution normally shaped? If not, explain why.

e. Compute the mean and standard deviation of the z distribution. I/O, other