Question: Explain how and what the Spider Chart is used for.QUESTION 4 A semiautomatic turret lathe machines the thickness of a part that is subsequently used

Explain how and what the "Spider Chart is used for.QUESTION 4
A semiautomatic turret lathe machines the thickness of a part that is subsequently used in an
assembly. The process mean is known to be 30mm with a standard deviation of 1.5mm.
a) Construct a control chart for the average thickness if samples of 5 are randomly selected
from the process. Table 1 below illustrates the average thickness of 15 samples selected
from the process. Plot these on a control chart, and discuss the results.
(14mks)

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