Find the margin of error.
-The football coach randomly selected ten players and timed how long each player took to perform a certain drill. the times (in minutes) were:
$$\begin{array} { l l l l l }
7 & 10 & 14 & 15 & 15 \
5 & 12 & 15 & 11 & 11
\end{array}$$
Find a 95 percent confidence interval for the population standard deviation $\sigma$.
A)(0.7, 2.2)
B)(2.4, 5.8)
C)(2.4, 6.3)
D)(2.3, 5.8)

Question

Find the margin of error.
-The football coach randomly selected ten players and timed how long each player took to perform a certain drill. the times (in minutes) were:
$$\begin{array} { l l l l l } 
7 & 10 & 14 & 15 & 15 \
5 & 12 & 15 & 11 & 11
\end{array}$$
Find a 95 percent confidence interval for the population standard deviation $\sigma$.
A)(0.7, 2.2)
B)(2.4, 5.8)
C)(2.4, 6.3)
D)(2.3, 5.8)

Quizplus · Accepted Answer

The correct answer is C because the margin of error is 2.4 and the sample standard deviation is 5.0, so the 95 percent confidence interval for the population standard deviation is (5.0 - 2.4, 5.0 + 2.4) = (2.6, 7.4).

Find the Margin of Error 710141515512151111\begin{array} { l l l l l } 7 & 10 & 14 & 15 & 15 \\5 & 12 & 15 & 11 & 11\end{array}75​1012​1415​1511​1511​

Find the Margin of Error $\begin{array} { l l l l l } 7 & 10 & 14 & 15 & 15 \\5 & 12 & 15 & 11 & 11\end{array}$