A certain brand of batteries has a lifetime that has a normal distribution with a mean of 50 hours and a standard deviation of 7 hours. What proportion of these batteries will last for more than 57 hours? You are told that P (Z < 1) = 0.84
A certain brand of batteries has a lifetime that has a normal distribution with a mean of 50 hours and a standard deviation of 7 hours. What proportion of these batteries will last for more than 57 hours? You are told that P (Z < 1) = 0.84
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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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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![QUESTION 34
A certain brand of batteries has a lifetime that has a normal distribution with a mean of 50 hours and a standard deviation
of 7 hours. What proportion of these batteries will last for more than 57 hours? You are told that P (Z < 1) = 0.84
%3D
84%
68%
16%
O 34%](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5631fd23-38fc-44c7-b387-9304ce5bce88%2F4a27f175-b078-48d4-9854-f141e47a5169%2F0xb7pab_processed.jpeg&w=3840&q=75)
Transcribed Image Text:QUESTION 34
A certain brand of batteries has a lifetime that has a normal distribution with a mean of 50 hours and a standard deviation
of 7 hours. What proportion of these batteries will last for more than 57 hours? You are told that P (Z < 1) = 0.84
%3D
84%
68%
16%
O 34%
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