Use the information to construct 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confide

he298c

he298c

Answered question

2021-06-20

Use the information to construct 90% and 99% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. Researchers have calculated the average daily time (in minutes) that Americans spend watching television using time-shifting devices like digital video recorders (DVRs) and other devices. To do so, the group takes a random sample of 30 U.S. adults and obtains the times (in minutes) below. 29 12 23 24 33 24 28 31 18 27 27 32 17 13 17 12 21 32 26 16 28 28 21 24 29 13 20 13 21 27 From past studies, the research council assumes that σσ is 6.5 minutes.

Answer & Explanation

yunitsiL

yunitsiL

Skilled2021-06-21Added 108 answers

90% confidence interval: (22.0452, 23.6882)
90% confidence interval: (19.8109, 25.9225)

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