The number of television viewing hours per household and the prime viewing times

Question

The number of television viewing hours per household and the prime viewing times are two factors that affect television advertising income. A random sample of 25 households in particular viewing area produced the following estimates of viewing hours per household:

3.0 6.0 7.5 15.0 12.0
6.5 8.0 4.0 5.5 6.0
5.0 12.0 1.0 3.5 3.0
7.5 5.0 10.0 8.0 3.5
9.0 2.0 6.5 1.0 5.0

A) Scan the data and use the range to find an approximate value for s.

B) Calculate the sample mean and the sample standard deviation, s.

C) Find the percentage of the viewing hours per household taht falls into the interval mean +/- 2 standard deviations.

PLEASE SEE PROBLEM #56, p.90 in Chapter 2 of Mendenhall's Introduction to Probability and Statistics (13th Edition) .

Explanation / Answer

a) 3.5 b) 3.49 c) 96 %

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