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.
-When testing H₀ : μ = 50 against H₁ : μ ≠ 50,where would the rejection region fall for this hypothesis test?

A) in the left tail
B) in the right tail
C) in both the left and right tails
D) at point zero