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If I would like to see if the random assignment works well, which t-test should I use?

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May Chan
2020年8月5日
If I would like to see if the random assignment works well, which t-test should I use?

If I would like to see if the random assignment works well, which t-test should I use?

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Miss Cheung
2020年8月5日

good ^^

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May Chan
2020年8月5日

Ok.

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Miss Cheung
2020年8月5日

T-test is powerful in testing the group difference, but I don’t think the T-test can help you determine whether the random assignment is truly random. I suggest the following three ways to help you assess the randomness of the assignment. 1) Visually compare the distribution (box, histogram, etc.) of each variable in group A and group B. The more similar they are in appearance, the more likely the assignment was random. 2) Statistically compare the distributions of each variable in groups A and B using a goodness of fit test. Two common ones are Kolmogorov-Smirnov Test for continuous features and Chi-Squared Test for categorical features. 3) Build a simple model to predict which group an observation will be assigned to. If an assignment is truly random then you should not be able to easily predict which group the observation was assigned to.

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