Solution-What proportion of light bulbs

What proportion of light bulbs

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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 questions.

(a) What proportion of light bulbs will last more than 60 hours?

(b) What proportion of light bulbs will last 53 hours or less?

(d) What is the probability that a randomly selected light bulb lasts less than 45 hours?

Reference no: EM131416755

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What proportion of light bulbs

Reference no: EM131416755

Reference no: EM131416755

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