Question

An average light bulb manufactured by the acme corporation lasts 300 days with a standard deviation of 50 days. assuming that bulb life is normally distributed, what is the probability that an acme light bulb will last at most 365 days?

Answer 1

1. 90% 2. 10% 3. 50%

Step-by-step explanation:

Given a mean score of 300 days and a standard deviation of 50 days, we want to find the cumulative probability that bulb life is less than or equal to 365 days. Thus, we know the following:

The value of the normal random variable is 365 days.

The mean is equal to 300 days.

The standard deviation is equal to 50 days.