Question

Using SPSS, give a point estimate and a 95% confidence interval estimate for the percentage of students who are female. Catagorical variable where 1=female, 0=male. How would you do this in spss?

Answer 1

Using SPSS, give a point estimate and a 95% confidence interval estimate for the percentage of students who are female. Catagorical variable where 1=female, 0=male. How would you do this in spss?

Analyze-----Compare Means >One Sample T-Test,

move the variable over to the “Test Variables:” box

Then below there is a box that says “Test Value.”put “0” in the “Test Value” and ok.

In the out put we get 95% confidence interval of the difference column, we get confidence interval for the required proportion. To get 95% confidence interval for percentage, multiply the intervals by 100.

This is not exact method to get confidence interval for proportion. We tricked SPSS to get this and so this is not completely accurate.