Mathematics, 25.03.2020 20:35 tiakimberly3
A chemist examines 12 sedimentary samples for bromide concentraction. The mean bromide concentration for the sample date is 0.437 cc/cubic meter with a standard deviation of 0.0325. Determine the 90% confidence interval for the population mean bromide consentraction. Assume the population is approximately normal.
a. Find the critical vaule that should be used in constructing the confidence interval. Round your answer to three decimal places.
b. Construct the 90% confidence interval. Round your answer to tree decimal places. Lower endpoint: Upper endpoint:
Answers: 2
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A chemist examines 12 sedimentary samples for bromide concentraction. The mean bromide concentration...
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