The survey mentioned in Problem 6.5 found that 25 of the 178 households consisted of unmarried couples who were living together. What is your estimate of the population proportion? Use the 95% level....

The survey mentioned in Problem 6.5 found that 25 of the 178 households consisted of unmarried couples who were living together. What is your estimate of the population proportion? Use the 95% level.

Problem 6.5

A researcher has gathered information from a random sample of 178 households. For each variable below, 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).