Suppose that the lifetimes of old-fashioned TV tubes are normally distributed with a standard deviation of 1.1 years. Suppose also that exactly 30% of the TV tubes die before 5 years. Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Suppose that the lifetimes of old-fashioned TV tubes are normally distributed with a standard deviation of 1.1 years. Suppose also that exactly 30% of the TV tubes die before 5 years. Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
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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Suppose that the lifetimes of old-fashioned TV tubes are
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