Suppose that you want to estimate the mean pH of rainfalls in an area that suffers from
Chapter 8, Problem 8.74(choose chapter or problem)
Suppose that you want to estimate the mean pH of rainfalls in an area that suffers from heavy pollution due to the discharge of smoke from a power plant. Assume that is in the neighborhood of .5 pH and that you want your estimate to lie within .1 of with probability near .95. Approximately how many rainfalls must be included in your sample (one pH reading per rainfall)? Would it be valid to select all of your water specimens from a single rainfall? Explain.
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