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Two-sample t test with equal variances
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Group | Obs Mean Std. Err. Std. Dev. [95% Conf. Interval]
---------+--------------------------------------------------------------------
0 | 421 41.8266 .546577 11.21482 40.75224 42.90097
1 | 293 41.05119 .6310294 10.80148 39.80925 42.29314
---------+--------------------------------------------------------------------
combined | 714 41.5084 .4133871 11.04602 40.6968 42.32
---------+--------------------------------------------------------------------
diff | .7754088 .8404765 -.8746999 2.425518
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diff = mean(0) - mean(1) t = 0.9226
Ho: diff = 0 degrees of freedom = 712
Ha: diff < 0 Ha: diff != 0 Ha: diff > 0
Pr(T < t) = 0.8217 Pr(|T| > |t|) = 0.3565 Pr(T > t) = 0.1783
比如这个T检验,我想得到的是输入结果显示如下表:
控制组 实验组 T检验
标准误
(T统计量)
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