Posted by **Ann** on Thursday, October 9, 2008 at 11:31pm.

The amount of time Ricardo spends brushing his teeth follows a Normal Distribution with unknown mean and standard deviation. Ricardo spends less than one minute brushing his teeth about 40% of the time. He spends more than two minutes brushing his teeth 2% of the time. Use this information to determine the mean and standard deviation of this distribution.

- Stats -
**Anonymous**, Monday, October 27, 2014 at 7:17pm
fgh

## Answer this Question

## Related Questions

- Health Repost - Earlier i posted a question about brushing teeth. I just wanted ...
- Math - Ricardo spends 8/9 hour reading the newspaper. He spends 1/4 of the time ...
- math - ricardo spends 8/9 hour reading the newspaper. He spends 1/4 of the time...
- statistics - The respiratory rate per minute in newborns varies according to a ...
- Statistics - "Working Mom’s Journal" reported that the mean time a mother, with ...
- Statistics - Information from the American Institute of Insurance indicates the...
- intro to statistics - "Working Mom’s Journal" reported that the mean time a ...
- MATH - Which of the following normal distributions has the smallest spread? A. A...
- stats. - The amount that airlines spend on food per passenger is normally ...
- Math - The amount of money Kylie spends on food to the amount she spends on gas ...