The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 69 hours. A random sample of 36 light bulbs indicated a sample mean life of 260 hours. Complete parts (a) through (d) below. Construct a 99% confidence interval estimate for the population mean life of light bulbs in this shipment. The 99% confidence interval estimate is from a lower limit of enter your response here hours to an upper limit of enter your response here hours. (Round to one decimal place as needed.)
The quality control manager at a light bulb factory needs to estimate the mean life of a large shipment of light bulbs. The standard deviation is 69 hours. A random sample of 36 light bulbs indicated a sample mean life of 260 hours. Complete parts (a) through (d) below. Construct a 99% confidence interval estimate for the population mean life of light bulbs in this shipment. The 99% confidence interval estimate is from a lower limit of enter your response here hours to an upper limit of enter your response here hours. (Round to one decimal place as needed.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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