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Question 9 of 9 < - /1 e : View Policies Current Attempt in Progress Johnson Electronics Corporation makes electric tube
Posted: Tue Apr 26, 2022 5:53 pm
by answerhappygod
- Question 9 Of 9 1 E View Policies Current Attempt In Progress Johnson Electronics Corporation Makes Electric Tube 1 (72.75 KiB) Viewed 23 times
Question 9 of 9 < - /1 e : View Policies Current Attempt in Progress Johnson Electronics Corporation makes electric tubes. It is known that the standard deviation of the lives of these tubes is 150 hours. The company's research department takes a sample of 105 such tubes and finds that the mean life of these tubes is 2400 hours. What is the probability that this sample mean is within 20 hours of the mean life of all tubes produced by this company? Round your answer to four decimal places. P= = i