Asked by Ava

If light bulbs have lives that are normally distributed with a mean of 2500 hours anda standard deviation of 500 hours, use the 68-95-99.7 rule to approximate the percentage of lightbulbs having a life less than 1500.

Answers

Answered by PsyDAG
1500 is 2 standard deviations (500 * 2 = 1000) below the mean of 2500.

95% = both directions from the mean, but you are only considering the lower end, so?
There are no AI answers yet. The ability to request AI answers is coming soon!

Related Questions