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Descriptive Statistics: Means and Standard Deviations

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
0 15
1 10
2 40
3 85
4 350
_________________________
Total 500

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?

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The solution computes mean's, standard deviations and z-scores for a number of questions

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