One proportion test
Comparing two proportions
Suppose we have data on the gender (male or female) and education status (graduate or not) for a set of N people. We want to compare the proportion of men who have graduated with the proportion of women who have graduated. Our data can be organized in three different ways:
Summary table
| Gender | Graduate | Non-graduate |
|---|---|---|
| Male | 40 | 60 |
| Female | 45 | 45 |
*Raw observations *
| Observation | Gender (Male = 1, Female = 0) | Education (Graduate = 1, non-graduate = 0) |
| 1 | 1 | 1 |
| 2 | 1 | 0 |
| 3 | 0 | 0 |
....
| 190 | 1 | 0 |
- Two columns *
Your data will be in two columns, one column for the male data and one for the female data. The male column will contain set of 100 observations, one for each man, indicating whether that observation is a graduate or non-graduate. The female column will contain 90 observations, one for each female. There will be 45 graduates and 45 non-graduates.
To compare the proportions, use the 2P Two proportion test in Minitab. If the data is in a summary table, choose the third option in this command (summarized data). If the data is organized by raw observation, pick the first option. The data is in the Education column, and the subscripts are gender. If the data is in two columns, pick the middle choice.