5 CY The lifetime of a certain brand of laptops has normal distribution with the mean of 6.2 and standard deviation of 3 years. Tif we take a random sample of size 100 laptops of this brand, what is the probability that their sample average lifetime will be between 5 and 9 years. Is the probability you obtain here exact or approximate? Explain. LIE Nhat should the manufacturer have as a warranty so that at most 10% of their laptops

5 CY The lifetime of a certain brand of laptops has normal distribution with the mean of 6.2 and standard deviation of 3 years. Tif we take a random sample of size 100 laptops of this brand, what is the probability that their sample average lifetime will be between 5 and 9 years. Is the probability you obtain here exact or approximate? Explain. LIE Nhat should the manufacturer have as a warranty so that at most 10% of their laptops

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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