Question

Using the standard normal table, the probability that seth’s light bulb will last no more than 14,500 (p(z ≤ 1. 25)) hours is about.

Answer 1

How many standard deviations above the mean is 14,500 hours 1.25 1.5 2.5 using the standard normal table the probability that Seth’s light bulb will last no more than 24,500 (P(z<1.25)) hours is about 89%.