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Estimate the mean ph of rainfalls in an area

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Reference no: EM131737886

Suppose you wish to estimate the mean pH of rainfalls in an area that suffers heavy pollution due to the discharge of smoke from a power plant. Previous studies showed that the standard deviation is in the neighborhood of .6 pH, and you wish your estimate to lie within .1 of the unknown mean µ, with probability .80. Approximately how many rainfalls must be included in your sample?

Reference no: EM131737886

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