The Essentials of Statistics: A Tool for Social Research
The Essentials of Statistics: A Tool for Social Research
4th Edition
ISBN: 9781305802698
Author: Joseph F. Healey
Publisher: Cengage Learning US
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Chapter 6, Problem 6.5P
SOC
A researcher has gathered information from a random sample of 178 households. For each of the following variables, construct confidence intervals to estimate the population mean. Use the 90% level.

a. An average of 2.3 people resides in each household. Standard deviation is 0.35 .

b. There was an average of 2.1 television sets ( s = 0.10 ) and 0.78 telephones ( s = 0.55 ) per household.

c. The households averaged 6.0 hours of television viewing per day ( s = 3.0 ) .

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