In a test of the reliability of his machine, a technician repeatedly measured th

Question

In a test of the reliability of his machine, a technician repeatedly measured the viscosity of a specimen of crude oil. On each, of three days, he took 50 measurements: Graph the 3 sets of data, side by side. Do you discern any trends from day to day? For each of the 3 days, calculate the mean and standard deviation. Do these calculations show the same trends you observed in part a? For the complete set of 150 observations, calculate the mean and standard deviation. How are they related to the means and standard deviations found in part b?

Explanation / Answer

You cannot ask more then one question per post, nobody will answer them for just 350 points. Please break them up, if you do I'd be glad to help. Let me know.

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