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Two-sample t test with equal variances
------------------------------------------------------------------------------
Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 930 .1437268 .0024915 .0759816 .1388371 .1486165
1 | 652 .1559464 .0031312 .0799526 .1497979 .1620948
---------+--------------------------------------------------------------------
combined | 1582 .1487629 .0019573 .0778506 .1449237 .1526021
---------+--------------------------------------------------------------------
diff | -.0122196 .0039659 -.0199985 -.0044407
------------------------------------------------------------------------------
diff = mean(0) - mean(1) t = -3.0812
Ho: diff = 0 degrees of freedom = 1580
Ha: diff < 0 Ha: diff != 0 Ha: diff > 0
Pr(T < t) = 0.0010 Pr(|T| > |t|) = 0.0021 Pr(T > t) = 0.9990
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