The accounting department at Weston Materials, Inc., a nationalmanufacturer of u

Question

The accounting department at Weston Materials, Inc., a nationalmanufacturer of unattached garages, reports that it takes twoconstruction workers a mean of 32 hours and a standard deviation of2 hours to erect the Red Barn model. Assume the assembly timesfollow the normal distribution.

b. What percent of the garages take between 29hours and 34 hours to erect?

           

c. What percent of the garages take 28.7 hoursor less to erect?

d. Of the garages, 5 percent take how manyhours or more to erect?

Please show work1

Explanation / Answer

X~Normal(32, 2^2) (a) The z value for 29 hours isz=(x-)/=(29-32)/2=-1.5       The z value for 34 hours isz=(34-32)/2=1        The percent of the garagestake between 32 hours and 34 hours to erect is        P(32

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