Asked by Bettie

The design tolerance thickness for an automotive part is 55mm to 65mm. If the process mean thickness is 61mm with a standard deviation of 2.3mm, then what percentage of the sheets will be acceptable?(What percentage will fall within the design tolerence?) Assume that the distribution of these parts is normally distributed
Answered by Steve
55mm is 61-2.61σ
65mm is 61+1.54σ
Consult your Z table to see that
.4955+.4382 = .9337 = 93.37% will pass
Answered by john
how u came up with 2.61 and 1.54
Answered by Sue
How did you come up with 2.61 and 1.54 when SD is 2.3?
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