Posted by Jessica on Sunday, July 29, 2012 at 11:44pm.
Drivers pay an average of (mean $690) per year for automobile insurance the distribution of insurance payments is approximately normal with a standard deviation of 110 dollars. What proportion of drivers pay more than 100 dollars per year for insurance?

statistics  catherine, Monday, July 30, 2012 at 3:00pm
how to get answer to geometric mean problem? data: 25.4, 9, 16, 4.25, 8.11, 19?

statistics  MathMate, Monday, July 30, 2012 at 5:13pm
Check for typo in your post. If there are no typos, here's how you would proceed.
Standardize:
P(X>100)
=1P(X≤100)
=1P(Z≤(100690)/110)
=1P(Z≤5.36)
Look up a probability table for
P(Z≤5.36) and calculate the answer accordingly.
Answer This Question
Related Questions
 statistics  Drivers pay an average of (mean $690) per year for automobile ...
 help please statistic  Teenage drivers pay more for automobile insurance than ...
 Statistics  A consumer agency wanted to investigate if four insurance companies...
 Statistics  A consumer agency wanted to investigate if four insurance companies...
 Stats  A car insurance company has determined that 7% of all drivers were ...
 Statistics  I have a problem I need some help on. I have answered parts. Any ...
 Statistics  A life insurance company sells a term insurance policy to a 21year...
 economics  Suppose you wish to invest X dollars in a bank account which pays 5...
 statistic help pls  a car insurance company has determined that 6% of all ...
 statistics  The respiratory rate per minute in newborns varies according to a ...
More Related Questions