The quality control manager at a pharmaceutical manufacturing factory needs to estimate the mean life of a large shipment of a raw material. The standard deviation is 100 hours. A random sample of 64 bags indicated a sample mean life of 350 hours. Construct a 99% confidence interval estimate of the population mean life of the raw material in this shipment. Do you think that the manufacturer has the right to state that the raw material lasts an average of 400 hours? Explain.
The quality control manager at a pharmaceutical manufacturing factory needs to estimate the mean life of a large shipment of a raw material. The standard deviation is 100 hours. A random sample of 64 bags indicated a sample mean life of 350 hours. Construct a 99% confidence interval estimate of the population mean life of the raw material in this shipment. Do you think that the manufacturer has the right to state that the raw material lasts an average of 400 hours? Explain.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 22SGR
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- The quality control manager at a pharmaceutical manufacturing factory needs to estimate the
mean life of a large shipment of a raw material. The standard deviation is 100 hours. A random sample of 64 bags indicated a sample mean life of 350 hours.
- Construct a 99% confidence
interval estimate of the population mean life of the raw material in this shipment.
- Do you think that the manufacturer has the right to state that the raw material lasts an average of 400 hours? Explain.
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