document.write( "Question 870233: call was given to the truck. Response time has mean M=8.8 minutes with standard deviation 2.1 minutes. If a random sample of 32 response time is taken, what is the probability that the average response time is
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Algebra.Com's Answer #524786 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Response time has mean M=8.8 minutes with standard deviation 2.1 minutes
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document.write( "random sample of 32 response time is taken:  2.1/sqrt(32) = .3712
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document.write( "a) z = .2/.3712 = .5388, P(z ≤ 9) = 70.50%
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document.write( "b) z = -.8/.3712 = -2.1552, P(z ≥ -2.1552) = 98.44% 
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document.write( "c) P(z ≤ -2.1552) = 1.56%, P(8 ≤ x ≤ 9) = 96.88% \n" );
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