Tuesday

September 16, 2014

September 16, 2014

Posted by **Brenna** on Thursday, October 29, 2009 at 11:50pm.

- Statistics -
**MathGuru**, Saturday, October 31, 2009 at 5:41pmTry a binomial proportion 2-sample z-test using proportions.

Hypotheses:

Ho: pF = pM (F = female; M = male)

Ha: pF > pM -->One-tailed test (shows a specific direction)

The formula is:

z = (pF - pM)/√[pq(1/n1 + 1/n2)]

...where 'n' is the sample sizes, 'p' is (x1 + x2)/(n1 + n2), and 'q' is 1-p.

I'll get you started:

p = (45 + 25)/(150 + 100) = ? -->once you have the fraction, convert to a decimal (decimals are easier to use in the formula)

q = 1 - p

pF = 45/150

pM = 25/100

Convert all fractions to decimals. Plug those decimal values into the formula and find z. Once you have this value, you will be able to determine the p-value or the actual level of this test statistic by using a z-table. Finally, determine whether or not to reject the null. If the null is rejected, then you can conclude that pF > pM.

I hope this will help.

**Answer this Question**

**Related Questions**

STATISTICS - Length of Hospital Stays: The average length of “short” hospital ...

Math - An observational study is described. Determine the nature and scope of ...

Psychology - The impact of drug x on fertility rates in young women A....

statistics - The heights of women aged 20 to 29 follow approximately the N (64, ...

Statistics - Suppose the heights of women aged 20 to 29 follow approximately the...

statistics - if young men thought that their own level of muscle was about what ...

statistics - we developed a 95% z confidence interval for the mean BMI of women ...

STAT - A college faculty consists of 400 men and 250 women. The college ...

Statistics - The heights of young women are approximately normally distributed ...

statistics - To find out what people think, the Gallup Poll selected a random ...