Engineers want to design seats in commercial aircraft so that they are wide enou

Question

Engineers want to design seats in commercial aircraft so that they are wide enough to fit 90 of all males.? (Accommodating 100% of males would require very wide seats that would be much too? expensive.) Men have hip breadths that are normally distributed with a mean of 14.1??in. and a standard deviation of 1.21.2 in. Find Upper P 90. That? is, find the hip breadth for men that separates the smallest 90?% from the largest 10?%. The hip breadth for men that separates the smallest 90?% from the largest 10?% is UpperP90equals= nothing in. ?(Round to one decimal place as? needed.)

Explanation / Answer

here as we know that for 90th percentile critical z=1.28

therefore correspnding hip breadth =mean +z*std deviaition=14.1+1.28*1.2=15.6 in

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