Question

Suppose that a brand of lightbulb lasts on average 1601 hours with a standard deviation of 179 hours. Assume the life of the lightbulb is normally distributed. Calculate the probability that aparticular bulb will last from 1418 to 1703 hours?P(1418 < X < 1703) =Enter your answer as a number accurate to 4 decimal places.*Note: all z-scores must be rounded to the nearest hundredth.

Answer 1

Given

[tex]\begin{gathered} \mu=1601 \\ \\ \sigma=179 \\ \\ P(1418