boxplot(score ~ gender, data = Remedial,
col = c("purple", "blue"))
t.test(score ~ gender, data = Remedial, conf.level = 0.98)
t.test(score ~ gender, data = Remedial, conf.level = 0.98)$conf
wilcox.test(score ~ gender, data = Remedial,
conf.int = TRUE, conf.level = 0.98)
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