***************************************************************
* *
* One-Way ANOVA *
* and Confidence Intervals for Mean BMI by Race *
* *
***************************************************************
insheet using http://hedwig.mgh.harvard.edu/biostatistics/sites/default/files/public/education/tmp_sample_data.csv
anova bmi race
margins race, post
********************************** ANNOTATED RESULTS **********************************
Number of obs = 60 R-squared = 0.0301
Root MSE = 3.76767 Adj R-squared = -0.0040
Source | Partial SS df MS F Prob > F
-----------+----------------------------------------------------
Model | 25.0845063 2 12.5422531 0.88 0.4189
|
race | 25.0845063 2 12.5422531 0.88 0.4189
|
Residual | 809.132844 57 14.1953131
-----------+----------------------------------------------------
Total | 834.21735 59 14.1392771
Adjusted predictions Number of obs = 60
Expression : Linear prediction, predict()
------------------------------------------------------------------------------
| Delta-method
| Margin Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
race |
1 | 26.07419 .6766929 38.53 0.000 24.7479 27.40049
2 | 26.60526 .864362 30.78 0.000 24.91114 28.29938
3 | 24.66 1.191441 20.70 0.000 22.32482 26.99518
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