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Find the Confidence Interval Specified 12.913.313.37.711.79.912.56.510.812.2\begin{array} { r r r r r } 12.9 & 13.3 & 13.3 & 7.7 & 11.7 \\9.9 & 12.5 & 6.5 & 10.8 & 12.2\end{array}

Question 4

Multiple Choice

Find the confidence interval specified. Assume that the population is normally distributed.
-The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 12.913.313.37.711.79.912.56.510.812.2\begin{array} { r r r r r } 12.9 & 13.3 & 13.3 & 7.7 & 11.7 \\9.9 & 12.5 & 6.5 & 10.8 & 12.2\end{array} Determine a 95% confidence interval for the mean time for all players.


A) 12.80 to 9.40 minutes
B) 9.50 to 12.70 minutes
C) 12.70 to 9.50 minutes
D) 9.40 to 12.80 minutes

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