Use the One-Standard-Deviation Chi-Square Interval Procedure to Obtain the Specified $\begin{array} { l l l l l } 6 & 14 & 10 & 9 & 8 \end{array}$

question 8

Multiple Choice

Use the one-standard-deviation chi-square interval procedure to obtain the specified confidence interval for thepopulation standard deviation Ϭ. Assume that the population has a normal distribution.
-A football coach randomly selected ten players from his college and timed how long each player took to perform a certain drill. The times (in minutes) were:
$\begin{array} { l l l l l } 6 & 14 & 10 & 9 & 8 \end{array}$
$\begin{array} { l l l l l } 15 & 11 & 10 & 13 & 10 \end{array}$
Find a $95 \%$ confidence interval for the standard deviation, $\sigma$ , of the times of all football players at this college.

• A)\(1.9\) to \(4.6 \mathrm {~min}\)
• B) \(1.8\) to \(4.6 \mathrm {~min}\)
• C) \(0.7\) to \(2.2 \mathrm {~min}\)
• D) \(1.9\) to \(5.0 \mathrm {~min}\)

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