Question 265566: Help me please. I am struggling with this.
A football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:
11 11 7 6 10 6 10 15 12 13
Assuming the population of times to complete the drill is known to be normally distributed, create a 95% confidence interval estimate for Mu, the mean amount of time for all players to complete the drill.
Identify x-bar, s, alpha, df, t, E and the confidence interval.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! A football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:
11 11 7 6 10 6 10 15 12 13
Assuming the population of times to complete the drill is known to be normally distributed, create a 95% confidence interval estimate for Mu, the mean amount of time for all players to complete the drill.
Identify
x-bar: 10.1
s: 2.998
alpha: 5%
df = 9
t (depends on whether they want the critical value or the test statistic)
E = 1.96*2.998/sqrt(10) = 1.8582..
the confidence interval: 10.1-1.8582 < u < 10.1+1.8582
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Cheers,
Stan H.
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