Saturday

December 20, 2014

December 20, 2014

Posted by **Anonymous** on Thursday, July 22, 2010 at 8:20pm.

- Statistics -
**MathGuru**, Friday, July 23, 2010 at 7:56pmTry this formula:

n = [(z-value)^2 * p * q]/E^2

...where n = sample size needed; use .8 for p and .2 for q (q = 1 - p). E = maximum error, which is .03 (3%) in the problem. Z-value is found using a z-table (for 98%, the value is 2.33). Also, ^2 means squared and * means to multiply.

I hope this will help get you started.

**Answer this Question**

**Related Questions**

statistics - The Academy of Orthopedic Surgeons states that 80% of women wear ...

statistics - A researcher at a major hospital wishes to estimate the proportion ...

statistics - please help - A researcher wishes to be 95% confident that her ...

Math/statistics - a recent study indicated that 29% of the 100 women over age 55...

English - I forgot to include the following list of words. Can you just tell me ...

Statistics - A researcher found a sample proportion of 0.94 for estimating the ...

statistics - Heights of young adult U.S. women are approximately normal with ...

statistics - Heights of young adult US women are approximately normal with mean ...

statistics - One of the problems with a study such as this one is the small size...

Stat Help - A researcher wishes to be 95% confident that her estimate of the ...