lizatapper9474 lizatapper9474

17-05-2022
Mathematics

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The battery life of a fully charged cell phone is normally distributed, with a mean of 14 hours and a standard deviation of 2 hours. What is the probability that a randomly selected cell phone will have a battery life of at least 8 hours

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jsimpson11000 jsimpson11000

17-05-2022

Answer:

.0013

Step-by-step explanation:

8 hours is 3 standard deviations BELOW the mean z-score = -3

from z scor table , tis corresponds to .0013

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