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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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