Question

Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Name: Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Uploaded: 2023-08-31T21:54:42-08:00
Duration: 1 min 56 s
Channel: Ivan Kochetkov
Description: Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

          Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.

Added by Michelle C.

Elementary Statistics a Step by Step Approach

Allan G. Bluman 9th Edition

Instant Answer

Solved by Expert Ivan Kochetkov

08/31/2023

Step 1

Sample mean (x̄) = (151 + 185 + 157 + 128) / 4 = 621 / 4 = 155.25 Now, let's find the sample standard deviation (s): s = √[(Σ(x - x̄)²) / (n - 1)] s = √[((151 - 155.25)² + (185 - 155.25)² + (157 - 155.25)² + (128 - 155.25)²) / (4 - 1)] s = √[((-4.25)² + Show more…

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Noise levels at 4 volcanoes were measured in decibels yielding the following data: 151, 185, 157, 128 Construct the 99 % confidence interval for the mean noise level at such locations. Assume the population is approximately normal. Step 3 of 4 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.