Determine the null and alternative hypotheses based on the following: The standard deviation in the pressure required to open a certain valve is known to be s = 1.1 psi. Due to changes in the...

Determine the null and alternative hypotheses based on the following:

The standard deviation in the pressure required to open a certain valve is known to be s = 1.1 psi. Due to changes in the manufacturing process, the quality-control manager feels that the pressure variability has increased.