The Weight of a USB Flash Drive Is 30 Grams $\alpha$

question 102

Multiple Choice

The weight of a USB flash drive is 30 grams and is normally distributed.Periodically, quality control inspectors at Dallas Flash Drives randomly select a sample of 17 USB flash drives.If the mean weight of the USB flash drives is too heavy or too light the machinery is shut down for adjustment; otherwise, the production process continues.The last sample showed a mean and standard deviation of 31.9 and 1.8 grams, respectively.Using $\alpha$ = 0.10, 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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