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 assembley follow the normal distribution.
a. Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
statistic - drwls, Monday, July 28, 2008 at 8:37pm
The z value for 29 is (29-32)/2 = -1.5
The z value for 34 is (34-32)/2 = 1.0
The probability for 32 to 34 is 34.1%
I used the graphical tool at http://psych-www.colorado.edu/~mcclella/java/normal/accurateNormal.html to get that last result
statistic - katie, Tuesday, July 29, 2008 at 4:32pm
the accontieg depatment at