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

Question

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] · Answer 1 · 2022-03-28T11:44:37+03:00

joja [24]3 years ago

7 0

The TV equals 20% because 1.1-4 years equals points