# A physicist examines 10 water samples for iron concentration. The mean iron concentration for the sample data is 0.711 cc/cubic meter with a standard deviation of 0.0816. Determine the 90% confidence interval for the population mean iron concentration. Assume the population is approximately normal.Construct the 90% confidence interval. Round your answer to three decimal places.

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A physicist examines 10 water samples for iron concentration. The mean iron concentration for the sample data is 0.711 cc/cubic meter with a standard deviation of 0.0816. Determine the 90% confidence interval for the population mean iron concentration. Assume the population is approximately normal.

Construct the 90% confidence interval. Round your answer to three decimal places.

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Step 1

From the given information, the sample size is 10, the sample mean iron concentration for the sample data is 0.711 and the sample standard deviation is 0.0816.

The degree of freedom is, – 1 = 10&nda...

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