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Q1) Life span of battery is normally distributed; with mean of 2400 hours and standard deviation of 40 hours .What percent of batteries have life span that is more than 2470 hours? Would it be unusual for a battery to have a life span which is more than 2470 hours? Describe your reasoning

What percent of batteries have a life span that is more than 2470 hours

Approximately ......% of batteries have a life span which is more than 2470 hours

Would it be unusual for a battery thave a life span that is more than 2470 hours? Describe your reasoning

a) It is unusual for battery to have a life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.

b) It is unusual for battery to have a life span that is more than 2470 hours as the z-score is not within 2 standard deviations of mean.

c) It is not unusual for battery to have life span that is more than 2470 hours as the z-score is not within 2 standard deviations of mean.

d) It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M9170007

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