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horsena [70]
3 years ago
15

Suppose that the lifetimes of TV tubes are normally distributed with a standard deviation of 1.1 years. Suppose also that exactl

y 20% of the tubes die before 4 years. Find the mean lifetime of TV tubes. Carry your intermediate computations to at least four decimal places. Round your answer to at least one decimal place.
Mathematics
1 answer:
joja [24]3 years ago
7 0
The TV equals 20% because 1.1-4 years equals points
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