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The accounting department at Weston Materials Inc.
The accounting department at Weston Materials Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution.
- Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
- What percent of the garages take between 29 hours and 34 hours to erect?
- What percent of the garages take 28.7 hours or less to erect?
- Of the garages, 5% take how many hours or more to erect?