25. Consider a sample with data values of 10, 20, 12, 17, and 16. Compute the z-score for each of the five observations.
57. A survey of subscribers to Fortune magazine asked the following question: "How many of the last four issues have you read?" Suppose that the following frequency distribution summarizes 500 responses.
Number Read Frequency
A. What is the mean number of issues read by a Fortune subscriber?
B. What is the standard deviation of the number of issues read?
The solution computes mean's, standard deviations and z-scores for a number of questions