# NOT RUN {
attach(case0102)
str(case0102)
boxplot(Salary ~ Sex,
ylab= "Starting Salary (U.S. Dollars)",
names=c("61 Females","32 Males"),
main= "Harris Bank Entry Level Clerical Workers, 1969-1971")
hist(Salary[Sex=="Female"])
dev.new()
hist(Salary[Sex=="Male"])
t.test(Salary ~ Sex, var.equal=TRUE) # Equal var. version; 2-sided by default
t.test(Salary ~ Sex, var.equal=TRUE,
alternative = "less") # 1-sided; that group 1 (females) mean is less
detach(case0102)
# }
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