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The accounting department at the weston material, Inc, national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and the standard deviation of 2 hours to erect red bam model. Suppose the assemble 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. Determine the percent of garages take between 29 hours and 34 hours to erect.

c. Determine the percent of garages which are 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

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