In a test for acid rain, an SRS of 49 water samples showed a mean pH level of 4.4 with a standard deviation Of 0.35. Find the
margin of error and write an expression for the 90% confidence interval estimate for the mean pH level.

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lelliott86

02.07.2021

Mathematics

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In a test for acid rain, an SRS of 49 water samples showed a mean pH level of 4.4 with a standard deviation Of 0.35. Find the margin of error and write an expression for the 90% confidence interval estimate for the mean pH level.