2.54 TV Viewers 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 house- holds in a particular viewing area produced the fol- lowing estimates of viewing hours per household:

a. Scan the data and use the range to find an approximate value for s. Use this value to check your calculations in part

b. b. Calculate the sample mean x and the sample standard deviations. Compare s with the approxi- mate value obtained in part

a. c. Find the percentage of the viewing hours per house- hold that falls into the interval 2s. Compare with the corresponding percentage given by the Empirical Rule.

Transcribed Image Text:

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