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60 of individuals keep their cars at most how many years

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Reference no: EM13618213

Suppose that the time owners keep their cars (purchased new) is normally distributed with a mean of 7 years and a standard deviation of 2 years. We are interested in how long an individual keeps his car (purchased new) Our population is people who buy their cars new.

a) 60% of individuals keep their cars at most how many years?

b) Suppose that we randomly survey one person. Find the probability that person keeps his/her car less than 2.5 years.

Reference no: EM13618213

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