55mm is 61-2.61σ
65mm is 61+1.54σ
Consult your Z table to see that
.4955+.4382 = .9337 = 93.37% will pass
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
3 answers
how u came up with 2.61 and 1.54
How did you come up with 2.61 and 1.54 when SD is 2.3?
1 answer