document.write( "Question 859349: Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed. \r
\n" ); document.write( "\n" ); document.write( "c.)The middle 80% of her laps are from _______ seconds to _______ seconds.\r
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Algebra.Com's Answer #517699 by stanbon(75887)\"\" \"About 
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Terri Vogel, an amateur motorcycle racer, averages 129.71 seconds per 2.5 mile lap with a standard deviation of 2.28 seconds. The distribution of her race times is normally distributed.
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\n" ); document.write( "Find the z-value with a left tail of 10%::
\n" ); document.write( "invNorm(0.10) = -1.2816
\n" ); document.write( "Find the corresponding time value:
\n" ); document.write( "Lower limit::::: x = -1.2816*2.28+129.71 = 126.79 seconds
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\n" ); document.write( "z-value with a right tail of 10%::
\n" ); document.write( "invNorm(0.10) = 1.2816
\n" ); document.write( "Upper limit;:::: x = 1.2816*2.28+129.71 = 132.63 seconds
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\n" ); document.write( "c.)The middle 80% of her laps are from _______ seconds to _______ seconds
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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