The Diameter of 3 $\alpha$ = 005, the Critical "T" Values Are ___

Multiple Choice

The diameter of 3.5 centimetre discs is normally distributed.Periodically, quality control inspectors at Winnipeg Discs randomly select a sample of 16 discs.If the mean diameter of the discs is too large or too small the disc punch is shut down for adjustment; otherwise, the punching process continues.The last sample showed a mean and standard deviation of 3.49 and 0.08 centimetres, respectively.Using $\alpha$ = 0.05, the critical "t" values are ___.

A) -2.120 and 2.120
B) -2.131 and 2.131
C) -1.753 and 1.753
D) -1.746 and 1.746
E) -2.567 and 2.567