第六round完成！
yeah!
今日玩抽獎
其實是關於
simple random sampling: without replacement and with replacement
一如往常的反應
當示範回置抽樣的時候
同學們都很驚訝
點解可以咁
好唔fair呀
太可愛了
於是決定人人有獎好了
#simple #random #sampling
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