document.write( "Question 265566: Help me please. I am struggling with this.\r
\n" ); document.write( "\n" ); document.write( "A football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:\r
\n" ); document.write( "\n" ); document.write( "11 11 7 6 10 6 10 15 12 13
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\n" ); document.write( "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.\r
\n" ); document.write( "\n" ); document.write( "Identify x-bar, s, alpha, df, t, E and the confidence interval.
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Algebra.Com's Answer #195335 by stanbon(75887)\"\" \"About 
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A football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were:
\n" ); document.write( "11 11 7 6 10 6 10 15 12 13\r
\n" ); document.write( "\n" ); document.write( "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.
\n" ); document.write( "Identify
\n" ); document.write( "x-bar: 10.1
\n" ); document.write( "s: 2.998
\n" ); document.write( "alpha: 5%
\n" ); document.write( "df = 9
\n" ); document.write( "t (depends on whether they want the critical value or the test statistic)
\n" ); document.write( "E = 1.96*2.998/sqrt(10) = 1.8582..
\n" ); document.write( "the confidence interval: 10.1-1.8582 < u < 10.1+1.8582
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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