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The following measurements (in picocuries per liter) were recorded by a set of radon gas detectors...

The following measurements (in picocuries per liter) were recorded by a set of radon gas detectors installed in a laboratory facility: 185.3,194.6,150.7 Using these measurements, construct a 95% confidence interval for the mean level of radon gas present in the facility. Assume the population is approximately normal. Step 4 of 4 : Construct the 95% confidence interval. Round your answer to two decimal places.

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Answer #1

Following table shows the calculations for mean and SD;

X (X-mean)^2
185.3 71.115489
194.6 314.459289
150.7 684.711889
Total 530.6 1070.286667

Step 4:

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