I am looking for code in order to do a simple a two-proportion test for mutually exclusive groups. To my knowledge, a chi-square test tells you me that the two categories are related (not indepedent) and does not provide what I desire. I need to test whether the proportions of the groups are equal applying the the principles in this https://onlinecourses.science.psu.edu/stat414/node/268 or this online calculator http://www.socscistatistics.com/tests/ztest/Default2.aspx
Example question: Is the proportion of URM students who succeed (58.33%) different than the proportion of non-URM students who also succeed (77.06%).
Table of URM by Success_category | |||
URM | Success_category | ||
Frequency(n) | ABCs | DFWs | Total |
0(non-URM) | 84(n) | 25(n) | 109 |
1(URM) | 70(n) | 50(n) | 120 |
Total | 154(n) | 75(n) | 229 |
Statistics for Table of URM by Success_category |
Statistic | DF | Value | Prob |
Chi-Square | 1 | 9.0987 | 0.0026 |
Likelihood Ratio Chi-Square | 1 | 9.2409 | 0.0024 |
Continuity Adj. Chi-Square | 1 | 8.2681 | 0.0040 |
Mantel-Haenszel Chi-Square | 1 | 9.0589 | 0.0026 |
Phi Coefficient |
| 0.1993 |
|
Contingency Coefficient |
| 0.1955 |
|
Cramer's V |
| 0.1993 |
|
http://support.sas.com/kb/22/561.html
@kfwright23 wrote:
I am looking for code in order to do a simple a two-proportion test for mutually exclusive groups. To my knowledge, a chi-square test tells you me that the two categories are related (not indepedent) and does not provide what I desire. I need to test whether the proportions of the groups are equal applying the the principles in this https://onlinecourses.science.psu.edu/stat414/node/268 or this online calculator http://www.socscistatistics.com/tests/ztest/Default2.aspx
Example question: Is the proportion of URM students who succeed (58.33%) different than the proportion of non-URM students who also succeed (77.06%).
Table of URM by Success_category
URM
Success_category
Frequency(n)
Percent
Row Pct
Col PctABCs
DFWs
Total
0(non-URM)
84(n)
36.68
77.06%
54.5525(n)
10.92
22.94
33.33109
47.601(URM)
70(n)
30.57
58.33%
45.4550(n)
21.83
41.67
66.67120
52.40Total
154(n)
67.2575(n)
32.75229
100.00
Statistics for Table of URM by Success_category
Statistic
DF
Value
Prob
Chi-Square
1
9.0987
0.0026
Likelihood Ratio Chi-Square
1
9.2409
0.0024
Continuity Adj. Chi-Square
1
8.2681
0.0040
Mantel-Haenszel Chi-Square
1
9.0589
0.0026
Phi Coefficient
0.1993
Contingency Coefficient
0.1955
Cramer's V
0.1993
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