1. A certain type of flashlight battery lasts on the average of 5 years with a standard deviation of0.75 year. Assuming that the battery lives are normally distributed, find the probability that agiven battery will last less than 3.5 years?2. The mean height of grade 9 students at a certain high school is 164 centimeters and thestandard deviation is 10 centimeters. Assuming the heights are normally distributed, whatpercent of the heights is greater than 168 centimeters?

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1. A certain type of flashlight battery lasts on the average of 5 years with a standard deviation of 0.75 year. Assuming that the battery lives are normally distributed, find the probability that a given battery will last less than 3.5 years?

1. A certain type of flashlight battery lasts on the average of 5 years with a standard deviation of 0.75 year. Assuming that the battery lives are normally distributed, find the probability that a given battery will last less than 3.5 years?

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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Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

Question

1. A certain type of flashlight battery lasts on the average of 5 years with a standard deviation of
0.75 year. Assuming that the battery lives are normally distributed, find the probability that a
given battery will last less than 3.5 years?
2. The mean height of grade 9 students at a certain high school is 164 centimeters and the
standard deviation is 10 centimeters. Assuming the heights are normally distributed, what
percent of the heights is greater than 168 centimeters?

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