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The accounting department of Weston Materials, Inc., national manufacturer of unattached garages, reports that it takes 2 construction workers a mean of 32 hours and standard deviation of two hours to erect the Red Barn model. Suppose the assembly times follow normal distribution.

a. Find out the z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?  

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

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

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

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M918133

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