Sunday

January 25, 2015

January 25, 2015

Posted by **jackie** on Friday, April 6, 2012 at 1:03pm.

What proportion of people in the U.S. drink more than 20 gallons of coffee a year?

- stats -
**MathGuru**, Friday, April 6, 2012 at 5:41pmUse z-scores.

Formula:

z = (x - mean)/sd

x = 20

mean = 24.2

sd = 8.1

Plug the values into the formula and calculate z. Then check a z-table using the z-score for the proportion of people who drink more than 20 gallons.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

statistics - The U.S. Department of Agriculture claims that the mean consumption...

Economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

economics - Annual per capita consumption of milk is 21.6 gallons (Statistical ...

economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

Economics. (6) - Annual per capita consumption of milk is 21.6 gallons (...

economics 6 - Annual per capita consumption of milk is 21.6 gallons (Statistical...

economics 6 PLEASE HELP ME? - Annual per capita consumption of milk is 21.6 ...