Reference no: EM133082512
The accounting department at Weston Materials Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 39 hours and a standard deviation of 5 hours to erect the Red Barn model. Assume the assembly times follow the normal distribution. Refer to the table in Appendix B.1.
a-1. Determine the z-values for 34 and 44 hours.
34 hours corresponds to z =
44 hours corresponds to z =
a-2. What percentage of the garages take between 39 hours and 44 hours to erect? (Round the final answer to 2 decimal places.)
Percentage %
b. What percentage of the garages take between 34 hours and 44 hours to erect? (Round the final answer to 2 decimal places.)
Percentage %
c. What percentage of the garages take 33.8 hours or less to erect? (Round the final answer to 2 decimal places.)
Percentage %
d. Of the garages, 9% take how many hours or more to erect? (Round the final answer to 1 decimal place.)
Hours =
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