Mathematics, 24.03.2020 20:00 Yeetious

Noise levels at 4 volcanoes were measured in decibels yielding the following data: 153,156,168,138 Construct the 99% confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 1 of 4 : Calculate the sample mean for the given sample data. Round your answer to one decimal place.

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Noise levels at 4 volcanoes were measured in decibels yielding the following data: 153,156,168,138 C...