Posted by savon on Monday, July 28, 2008 at 4:18pm.
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 (2932)/2 = 1.5
The z value for 34 is (3432)/2 = 1.0
The probability for 32 to 34 is 34.1%
I used the graphical tool at http://psychwww.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