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 50 hours
or less?
(c) What proportion of light bulbs will last
between 58 and 62 hours?(d) What is the
probability that a randomly selected light bulb lasts less
than 46 hours?
Question content area bottom
Part 1
(a) The proportion of light bulbs that last more
than 60 hours is
enter your response here.
(Round to four decimal places as needed.)
Part 2
(b) The proportion of light bulbs that last 50 hours
or less is
enter your response here.
(Round to four decimal places as needed.)
Part 3
(c) The proportion of light bulbs that lasts
between 58 and 62 hours is
enter your response here.
(Round to four decimal places as needed.)
Part 4
(d) The probability that a randomly selected light bulbs lasts
less than 46 hours is
enter your response here.
(Round to four decimal places as needed.)
Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standar
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answerhappygod
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Suppose that the lifetimes of light bulbs are approximately normally distributed, with a mean of 56 hours and a standar
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