SOLUTION: calculate commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. what proportion of people spend less than 20 minutes commuting
Algebra ->
Probability-and-statistics
-> SOLUTION: calculate commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. what proportion of people spend less than 20 minutes commuting
Log On
Question 804591: calculate commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. what proportion of people spend less than 20 minutes commuting Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Commuting time is normally distributed with mean 45 mins per day, and standard deviation 10 minutes. What proportion of people spend less than 20 minutes commuting?
--------
z(20) = (20-45)/10 = -25/10 = -2.5
-----
p(x < 20 min ) = p(z < -2.5) = normalcdf(-100,-2.5) = 0.0062
=================
Cheers
Stan H.
=================
(