The length of industrial filters is a quality characteristic of interest. Thirty samples, each of size 5, are chosen from the process. The data yields an average length of110 mm, with the process standard deviation estimated to be 4 mm. (i) find the warning limits for the control chart. [1] (ii) find the 3 control limits for the control chart. [1] (iii) what is the probability of type i error? [1] (iv) if the process mean shifts to 112 mm, what are the chances of detecting this shift by the third sample drawn after the shift?
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soo long question ask from your teacher
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