Download pptx - Stanard Deviation and T-test(1) (1)

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Seatwork:

Seatwork:

Seatwork:The Ca content of a powdered mineral sample was analyzed four times by two methods believed to have similar precision. The results are shown below. Are the mean values for these two methods the same at the 90% confidence level?

Percent Ca (w/w)Method 10.02710.02820.02790.0271Method 20.02710.02680.02630.0274

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