Basic statistics
ANCOVA
Compare treatments after removing the effect of a covariate, such as plant stand or initial weight.
Data format
Column names in the first row, then one row per plot: group, response (Y), covariate (X).
Treatment, Yield, Plant stand T1, 24.5, 42 T1, 26.1, 46 T2, 28.0, 45
You get
- ANCOVA table (Type III) with the pooled regression slope
- Observed and adjusted means with standard errors
- Pairwise comparisons of adjusted means and a test of parallel slopes
Downloads as Excel, PDF and Word.
Enter data
First row: column names. Then one row per plot or unit: its group, the response (Y) and the covariate (X).
or drag and drop here