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  3. 1. (18.10) emissions of sulfur dioxide by industry

1. (18.10) Emissions of sulfur dioxide by industry set off chemical changes in the atmosphere that...

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Basic Math

1. (18.10) Emissions of sulfur dioxide by industry set offchemical changes in the atmosphere that result in \"acid rain.\" Theacidity of liquids is measured by pH on a scale of 0 to 14.Distilled water has pH 7.0, and lower pH values indicate acidity.Normal rain is somewhat acidic, so acid rain is sometimes definedas rainfall with a pH below 5.0. Suppose that pH measurements ofrainfall on different days in a Canadian forest follow a Normaldistribution with standard deviationσ= 0.5. A sample ofndays findsthat the mean pH isx= 4.8.

Give a 80 % confidence interval for the mean pH μ when n = 5, n= 15, and n = 40

n= 5 ____to ____

n= 15__ to ___

n= 40 __ to __

Answer & Explanation Solved by verified expert
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Solution Given thatPoint estimate sample mean 48Population standard deviation 051 Sample size n 5At    See Answer
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