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?
2. What percent of the garages take between 29 hours and 34 hours to
erect?
3. What percent of the garages take 28.7 hours or less to erect?
4.Of the garages, 5 percent take how many hours or more to erect?
Statistics Homework Solutions
#129374
Z Values/Percentages
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.
1. Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
2. What percent of the garages take between 29 hours and 34 hours to erect?
3. What percent of the garages take 28.7 hours or less to erect?
4.Of the garages, 5 percent take how many hours or more to erect?
The solution gives the details of calculation of Z score for normal random variables. Probability for different events are also computed based on Z score.
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