Question: The standard deviation in the pressure required to open a certain valve is known to be =1.3 psi. Due to changes in the manufacturingprocess, thequality-control

The standard deviation in the pressure required to open a certain valve is known to be =1.3 psi. Due to changes in the manufacturingprocess, thequality-control manager feels that the pressure variability has beenreduced.

(a)

Determine the null and alternative hypotheses.

(b)

Explain what it would mean to make a Type I error.

(c)

Explain what it would mean to make a Type II error.

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