In a sample of 80 light bulbs, the mean lifetime was 1,217 hours with a standard deviation of 52.0 hours. Find a 95% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)Find a 98% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)
In a sample of 80 light bulbs, the mean lifetime was 1,217 hours with a standard deviation of 52.0 hours. Find a 95% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)Find a 98% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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In a sample of 80 light bulbs, the mean lifetime was 1,217 hours with a standard deviation of 52.0 hours.
Find a 95% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)
Find a 98% confidence interval for the mean lifetime of this type of light bulb. (Round the final answers to three decimal places.)
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