Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standard deviation of 3.3 hours. With this information, answer the following...

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of

hours and a standard deviation of

3.3

hours. With this information, answer the following questions.

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of

hours and a standard deviation of

3.3

hours. With this information, answer the following questions.

(a) What proportion of light bulbs will last more than

hours?

(b) What proportion of light bulbs will last

hours or less?

and

hours?

(d) What is the probability that a randomly selected light bulb lasts less than

hours?

Jun 01, 2022

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