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

question 20

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

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