The Next Questions Are Based on the Following Information

Multiple Choice

The Next Questions Are Based On The Following Information:
A hydraulic press is operating correctly when the standard deviation of the pressure is less than 120 pounds-per-square-inch (psi) .Suppose you take a random sample of 15 measurements throughout the day of the psi and find the standard deviation to be 148.Suppose you want to test whether the press is operating correctly.
-For a two-tailed test at the 0.05 significance level,what is the rejection region when n is large and the population standard deviation is known?

A) between -1.645 and +1.645
B) between -1.96 and +1.96
C) less than -1.645 or greater than +1.645
D) less than -1.96 and greater than 1.96