Question

5. Before agreeing to purchase a large order of polyethylene sheaths for a particular type of high-pressure oil- filled submarine power cable, a company wants to see conclusive evidence that the true standard deviation $\sigma$ of sheath thickness is less than 0.05 mm. (a) (2 pts) What null and alternative hypotheses should be tested? $H_0$: ____________________________________, $H_a$: ____________________________________ (b) (1 pt) Is "concluding the variability in thickness is satisfactory when it is not." the type I or type II error? Type I, Type II (c) (1 pt) Is "concluding the variability in thickness is not satisfactory when it is." the type I or type II error? Type I, Type II

          5. Before agreeing to purchase a large order of polyethylene sheaths for a particular type of high-pressure oil- filled submarine power cable, a company wants to see conclusive evidence that the true standard deviation $\sigma$ of sheath thickness is less than 0.05 mm.

(a) (2 pts) What null and alternative hypotheses should be tested?

$H_0$: ____________________________________, $H_a$: ____________________________________

(b) (1 pt) Is "concluding the variability in thickness is satisfactory when it is not." the type I or type II error?

Type I, Type II

(c) (1 pt) Is "concluding the variability in thickness is not satisfactory when it is." the type I or type II error?

Type I, Type II

5 before agreeing to purchase a large order of polyethylene sheaths for a particular type of high pressure oil filled submarine power cable a company wants to see conclusive evidence that th 97947

Added by Jessica W.

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