If you spend less than one minute brushing your teeth about 40% of the time and more than two minutes brushing 2% of the time, what are the mean and standard deviation of the normal distribution for the amount of time you brush your teeth?

- October 1st 2009, 02:10 AMcb113Normal distribution with an unknown mean and standard deviation
If you spend less than one minute brushing your teeth about 40% of the time and more than two minutes brushing 2% of the time, what are the mean and standard deviation of the normal distribution for the amount of time you brush your teeth?

- October 1st 2009, 02:13 AMmr fantastic
Answered here: http://www.mathhelpforum.com/math-he...tion-mean.html

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