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the average employee in ontario spends mu=24.0 minutes commuting to work each day. Assume that the...

the average employee in ontario spends mu=24.0 minutes commuting to work each day. Assume that the distribution of commute times is normal with a standard deviation of sigma=8.0 minutes.

a)what proportion of ontario employees spend less than 25 minutes a day commuting?

b)what is the probability of randomly selecting an employee who spends more than 20 minutes commuting each day?

c) what proportion of employees spend between 11 and 15 minutes commuting?

d)what is the 50th percentile in this distribution of commute times?

e)what is the 75 percentile in this distribution of commute times?

Math   Statistics-And-Probability   
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