C Not Secure ezto.mheducation.com/hm.tpx The lifetime of a battery in a certain

Question

C Not Secure ezto.mheducation.com/hm.tpx The lifetime of a battery in a certain application is normally distributed with mean = 16 hours and standard deviation = 2 hours. References eBook& Resources Section Break Difficuity. Easy Chapter: 04 Commonly Used Distributions Section: 04.05 The Normal Distribution value: 2.17 points A particular battery lasts 14.5 hours, What percentile is its lifetime on? Round the answer to two decimal places A lifetime of 14.5 is on the percentile, approximately. Hints References eBook & Resources Hint#1 Check my work

Explanation / Answer

5)

Z = (X - mean)/sd

= (X - 16)/2

P(X < 14.5)

= P(Z <(14.5 - 16)/2)

= P(Z < -0.75)

= 0.2266

hence 22.66 percentile

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