Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57hours and a standard deviation of 3.5 hours. With this information, answer the following questions....

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57hours and a standard deviation of 3.5
hours. With this information, answer the following questions.

(a) What proportion of light bulbs will last more than 61 hours?

(b) What proportion of light bulbs will last 51 hours or less?

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

(a) The proportion of light bulbs that last more than

61 hours is ________?

(Round to four decimal places as needed.)

Jun 01, 2022

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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57hours and a standard deviation of 3.5 hours. With this information, answer the following questions....

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Suppose that the lifetimes of light bulbs are approximately normally​ distributed, with a mean of 57hours and a standard deviation of 3.5 hours. With this​ information, answer the following questions....

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Related Questions & Answers

Submit New Assignment

Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 57hours and a standard deviation of 3.5 hours. With this information, answer the following questions....