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A physicist examines 4 seawater samples for potassium chloride concentration. The mean potassium chloride concentration for...

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Statistics

A physicist examines 4 seawater samples for potassium chlorideconcentration. The mean potassium chloride concentration for thesample data is 0.604 cc/cubic meter with a standard deviation of0.0177. Determine the 80% confidence interval for the populationmean potassium chloride concentration. Assume the population isapproximately normal.

1)Find the critical value that should be used in constructingthe confidence interval. Round your answer to three decimalplaces.

2)Construct the 80% confidence interval. Round your answer tothree decimal places.

Answer & Explanation Solved by verified expert
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Solution Given that 0604s 00177n 4Degrees of freedom df n 1    See Answer
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