Construct a 95% Z-Interval or a 95% T-Interval About the Population

question 29

Multiple Choice

Construct a 95% Z-interval or a 95% t-interval about the population mean. Assume the data come from a population that
is approximately normal with no outliers.
-Fifteen randomly selected men were asked to run on a treadmill for 6 minutes. After the 6 minutes, their pulses were measured and the following data were obtained:
$\begin{array}{rrrrr}105 & 94 & 98 & 88 & 104 \\\hline 101 & 99 & 85 & 84 & 124 \\\hline 122 & 114 & 97 & 101 & 90\end{array}$

• A) \(( 93.7,107.1 )\); we are \(95 \%\) confident that the mean pulse rate of men after 6 minutes of exercise is between \(93.7\) and \(107.1\) beats per minute.
• B) \(( 94.9,105.9 )\); we are \(95 \%\) confident that the mean pulse rate of men after 6 minutes of exercise is between \(94.9\) and \(105.9\) beats per minute.
• C) \(( 94.2,106.6 )\); we are \(95 \%\) confident that the mean pulse rate of men after 6 minutes of exercise is between \(94.2\) and \(106.6\) beats per minute.
• D) \(( 95.2,105.6 )\); we are \(95 \%\) confident that the mean pulse rate of men after 6 minutes of exercise is between \(95.2\) and \(105.6\) beats per minute.

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