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The lifetimes of a certain type of light bulbs follow a normal distribution. If 4% of...

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Basic Math

The lifetimes of a certain type of light bulbs follow a normaldistribution. If 4% of the bulbs have lives exceeding 462 hours,and 40% have lives exceeding 372 hours, what are the mean andstandard deviation of the lifetimes of this particular type oflight bulbs? Round your answer to the nearest integer.

Mean = hours

Standard deviation = hours

Answer & Explanation Solved by verified expert
3.8 Ratings (679 Votes)
Given X Life time of BulbX follows normal distributionWe have given 4 of the bulbs have lives exceeding 462hoursP X 462 004so we getP X 462 1 004P X 462 096Now we find the    See Answer
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