The lifetime T (this year) for a particular type of electric toothbrush is assumed to have theprobability density f given bytf(t)3 180 ≤t≤ 6otherwise. (c) What is the probability that the average lifespan of barT for 90 independent toothbrushesis greater than 2.1 years?

Given information, ft=13-t18, 0≤t≤6 Consider, Et=∫06tftdt =∫06t*13-t18dt…

Answered: The lifetime T (this year) for a…

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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The lifetime T (this year) for a particular type of electric toothbrush is assumed to have the probability density f given by 1 t 0 < + < 6