Following Are the Heights in Inches of 12 Two-Year-Old Apple $\begin{array}{llllll}\hline 37.5 & 35.3 & 39.2 & 38.7 & 43.0 & 41.9 \\\hline 36.7 & 38.0 & 40.9 & 38.3 & 37.8 & 41.8 \\\hline\end{array}$

question 39

Multiple Choice

Following are the heights in inches of 12 two-year-old apple trees. Assume that the population is normally distributed.
$\begin{array}{llllll}\hline 37.5 & 35.3 & 39.2 & 38.7 & 43.0 & 41.9 \\\hline 36.7 & 38.0 & 40.9 & 38.3 & 37.8 & 41.8 \\\hline\end{array}$

Construct a $90 \%$ confidence interval for the population standard deviation $\sigma$ .

• A) \(( 1.75,3.62 )\)
• B) \(( 1.86,3.28 )\)
• C) \(( 1.77,3.54 )\)
• D) \(( 1.69,3.39 )\)