Use the following to answer the questions below:
November 6, 2012 was election day. Many of the major television networks aired coverage of the incoming election results during the primetime hours. The provided table displays the amount of time (in minutes) spent watching election coverage for a random sample of 25 U.S. adults.

-Use the estimate of the standard error to construct a 95% confidence interval for the mean amount of time (in minutes) U.S. adults spent watching election coverage on election night. Use three decimal places in your answer.
A) 62.902 to 97.978 minutes
B) 71.671 to 89.209 minutes
C) 52.462 to 87.538 minutes
D) 58.529 to 81.471 minutes

Question

Use the following to answer the questions below:
November 6, 2012 was election day. Many of the major television networks aired coverage of the incoming election results during the primetime hours. The provided table displays the amount of time (in minutes) spent watching election coverage for a random sample of 25 U.S. adults.
 
-Use the estimate of the standard error to construct a 95% confidence interval for the mean amount of time (in minutes) U.S. adults spent watching election coverage on election night. Use three decimal places in your answer.
A) 62.902 to 97.978 minutes 
B) 71.671 to 89.209 minutes 
C) 52.462 to 87.538 minutes 
D) 58.529 to 81.471 minutes

Quizplus · Accepted Answer

The correct answer is A because the 95% confidence interval is 62.902 to 97.978 minutes. This interval is calculated by taking the sample mean (75.44 minutes) and adding and subtracting 1.96 times the standard error (12.536 minutes).

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