Question

The mean number of hours watching TV per week for a sample of 585 college students is 28. If the margin of error for the population mean with a 98% confidence interval is 1.4, construct a 98% confidence interval for the mean number of hours watching TV per week for all college students.

Answer 1

(26.6,29.4)

Explanation:

The 98% confidence interval can be computed as

Point estimate± Margin of error

Point estimate=mean number of hours watching TV by college students=28.

Margin of error=1.4.

The 98% confidence interval for mean number of hours watching TV per week for all college students

28± 1.4

(28-1.4,28+1.4)

(26.6,29.4).