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.
-A random sample of size 10 is selected from a normal population,where the population standard deviation is unknown.Assume that a two-tailed test at the 0.10 significance level is to be used.For what value of t will the null hypothesis not be rejected?

A) to the left of -1.812 or to the right of 1.812
B) to the left of -1.372 or to the right of 1.372
C) to the left of -1.833 or to the right of 1.833
D) to the left of -1.383 or to the right of 1.383