An industrial supplier has shipped a truckload of teflon lubricant cartridges to an aerospace customer. The customer has been assured that the mean weight of these cartridges is in excess of the 15 ounces printed on each cartridge. To check thisclaim, a sample of n=20 cartridges are randomly selected from the shipment and carefully weighed. Summary statistics for the sampleare: x=15.16ounces, s=0.30ounce. To determine whether thesupplier's claim istrue, consider thetest, H0: = 15 vs. Ha:>15, where is the true mean weight of the cartridges. Find the rejection region for the test using =0.01.

A.

z>2.33

B.

t>2.539, where t depends on 19 df

C.

t>2.861, where t depends on 19 df

D.

|z|>2.58