Suppose that the lifetimes of TV gives are normally distributed with a standard deviation of 1.2 years. Suppose also that exactly 30% of the tubes die before 5 years. Find the mean lifetime of tv tubes. Carry your intermediate computations to at least 4 decimal places. Round your answer to at least one

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Suppose that the lifetimes of TV gives are normally distributed with a standard deviation of 1.2 years. Suppose also that exactly 30% of the tubes die before 5 years. Find the mean lifetime of tv tubes. Carry your intermediate computations to at least 4 decimal places. Round your answer to at least one

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