2个;【医】【=chi square】卡方
例句:
Each rate was shown by percentage and was compared with by x2 test.
率的比较采用x~2检验;
ANOVA or x2 Check were used among 3 groups.
组间比较用ANOVA分析或x2检验。
The distribution of categorical variables was studied using X2 tests.
使用X2分析研究分类变量的分布。