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Answer to Question #47127 in Statistics and Probability for Sam

Question #47127
1. The new Twinkle bulb has a standard deviation hours. A random sample of 60 light bulbs is selected from inventory. The sample mean was found to be 500 hours.

Construct 90%, 95% and 99% confidence intervals for the mean life,  of all Twinkle bulbs. Round to the nearest three decimals.

Please help me solve this with steps
1
Expert's answer
2014-09-29T09:44:17-0400
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