a) A machine is set to produce disc plates with a mean diameter of 14 mm. A sample of 8 discs gave a mean diameter, ?̅ = 14.9 mm and a standard deviation, s = 1.33 mm. A test was carried out at the 5%...


a) A machine is set to produce disc plates with a mean diameter of 14 mm. A sample of 8 discs
gave a mean diameter, ?̅ = 14.9 mm and a standard deviation, s = 1.33 mm. A test was
carried out at the 5% level of significance to determine whether the machine is in good
working order. Assume that the diameter of the disc follows a normal distribution.


v. State, with reason, a valid conclusion for the test.



Jun 01, 2022
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