Analysis of several plant-food preparations for potassium ion yielded the following data: The preparations were randomly drawn
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Analysis of several plant-food preparations for potassium ion yielded the following data:
The preparations were randomly drawn from the same population.
(a) Find the mean and standard deviation s for each sample.
(b) Obtain the pooled value spooled.
(c) Why is spooled a better estimate of σ than the standard deviation from any one sample?
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Related Book For 
Fundamentals Of Analytical Chemistry
ISBN: 9780357450390
10th Edition
Authors: Douglas A. Skoog, Donald M. West, F. James Holler, Stanley R. Crouch
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