Homework Help: statistics

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)
=1-P(X≤100)
=1-P(Z≤(100-690)/110)
=1-P(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 ...
Statistics - A life insurance company sells a term insurance policy to a 21-year...
Statistics - A consumer agency wanted to investigate if four insurance companies...
Statistics - A consumer agency wanted to investigate if four insurance companies...
programming - the drive-rite insurance company provides automobile insurance ...
statistics - any state auto insurance company took a random sample of 370 ...
Statistics - 1) Laura McCarthy, the owner of Riverside Bakery, has been ...
Statistics - ) Laura McCarthy, the owner of Riverside Bakery, has been ...
Stats - A car insurance company has determined that 7% of all drivers were ...
ACCOUNTING - On July 1, 2011 you purchase and pay $36,000 for a three year ...

For Further Reading

First Name:
School Subject:
Answer: