Noise levels at five volcanoes are measured in decibels yielding the following data: 127, 174, 157, 120, 161. Construct a


Noise levels at five volcanoes are measured in decibels yielding the following data: 127, 174, 157, 120, 161. Construct a 98% confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Calculate the sample standard deviation for the given sample data


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