Cell Phone Lifetimes A recent study of the lifetimes of cell phones found the average is 23.9 months. The standard deviation is 2.9 months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be less than 23.8 months. Assume cell phone life is a normally distributed variable, the sample is taken from a large population, and the correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator. Round your answer to at least four decimal places. P(X<23.8)=|
Cell Phone Lifetimes A recent study of the lifetimes of cell phones found the average is 23.9 months. The standard deviation is 2.9 months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be less than 23.8 months. Assume cell phone life is a normally distributed variable, the sample is taken from a large population, and the correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator. Round your answer to at least four decimal places. P(X<23.8)=|
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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![Cell Phone Lifetimes A recent study of the lifetimes of cell phones found the average is 23.9 months. The standard deviation is 2.9
months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be
less than 23.8 months. Assume cell phone life is a normally distributed variable, the sample is taken from a large population, and the
correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator. Round your answer to at least four decimal places.
P(X<23.8)=](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb63fc9e3-7584-4c90-be8d-bc130c8a2c55%2F35dc423a-3add-4c70-acee-af1896f61642%2Frucvjdt_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Cell Phone Lifetimes A recent study of the lifetimes of cell phones found the average is 23.9 months. The standard deviation is 2.9
months. If a company provides its 33 employees with a cell phone, find the probability that the mean lifetime of these phones will be
less than 23.8 months. Assume cell phone life is a normally distributed variable, the sample is taken from a large population, and the
correction factor can be ignored. Use a TI-83 Plus/TI-84 Plus calculator. Round your answer to at least four decimal places.
P(X<23.8)=
![Police Academy Acceptance Exams In order to qualify for a police academy, applicants are given a test of physical fitness. The scores
are normally distributed with a mean of 62 and a standard deviation of 12. If only the top 20% of the applicants are selected, find the
cutoff score. Use a graphing calculator and round the answer to the nearest whole number.
The cutoff score for the top 20% of the scores is](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb63fc9e3-7584-4c90-be8d-bc130c8a2c55%2F35dc423a-3add-4c70-acee-af1896f61642%2Fegjdkud_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Police Academy Acceptance Exams In order to qualify for a police academy, applicants are given a test of physical fitness. The scores
are normally distributed with a mean of 62 and a standard deviation of 12. If only the top 20% of the applicants are selected, find the
cutoff score. Use a graphing calculator and round the answer to the nearest whole number.
The cutoff score for the top 20% of the scores is
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