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Statistics help please! Really don't understand this!

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Airline doors have an overhead clearance of 70". Male heights are normally distributed with a mean of 69.5" and a standard deviation of 2.4". If there are 100 male passengers on the plane, what is the probability that the mean height of male passengers is less than 70"?

Oct 22nd, 2017

z=(70-69.5)/2.4

z=0.2083

the probability corresponding to this z value is 0.5080

the probability that the mean height of male passengers is less than 70 is 0.5080

Apr 23rd, 2015

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Oct 22nd, 2017
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Oct 22nd, 2017
Oct 23rd, 2017
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