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.

Expert Solution

The following information has been provided:

We need to compute

The corresponding z-value needed to be computed:

Therefore,

orchestra answered 2 years ago

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