A power company manufactures a 100-watt light bulb that, according to the specifications written on the box, has a half-life of 900 hours with a standard deviation of 50 hours.

A power company manufactures a 100-watt light bulb that, according to the specifications written on the box, has a half-life of 900 hours with a standard deviation of 50 hours. At most, what percentage of the bulbs do not last at least 700 hours? Assume that the distribution is symmetric around the mean.

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Expert Solution

The following information has been provided:

We need to compute

The corresponding z-value needed to be computed:

Therefore,

orchestra answered 1 year ago

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