<PRE><B>Question 171641</B>

The Ph of a patients blood was measured periodically during one week, and the measured values were 7.37, 7.40, 7.45, 7.45, and 7.44.  Find the standard deviation and variance for the data. Round the results to the nearest thousandth.

I added 7.37 + 7.40 + 7.45 + 7.45 + 7.44  = 37.11

then I divided 37.11/ 5 and came up with the answer of 7.4222

Did I do this right? 
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That is the mean; you want the standard deviation (s) and the variance (s^2)
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Cheers,
Stan H.

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