WWC standards

Standardized effect size (you can also use this for baseline equivalence test).

This looks like a test of two means, but you can also use it to test binary variables (you will need to fill in an SD value with any number).

https://www.estat.us/file/calc_t_test1b.php

 

0.00 <= baseline ES <= 0.05 Satisfies BE
0.05 < baseline ES <= 0.25 with covariates baseline ES > 0.25 Fails

 

OLD VERSION

https://www.estat.us/file/calc_t_test1.php

 

Attrition (Page 10 of https://ies.ed.gov/ncee/wwc/Docs/referenceresources/WWC-Standards-Handbook-v4-1-508.pdf )