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The standard deviation in the pressure required to open a certain valve is known to be...

The standard deviation in the pressure required to open a certain valve is known to be sigma equals 1.4 psi. Due to changes in the manufacturing​ process, the​ quality-control manager feels that the pressure variability has increased.

​(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.

Math   Statistics-And-Probability   
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