When doing the t-test in the below manner will r compare each element of the
array with the relevant one. I.e. if i was comparing x and y would (1 and 0)
and (1 and 9) be treated as separate variables. Or does it just assume one
variable.
# test data
x <- c(1,1.1,1.15,1.2,1.21,1.23)
y <- c(0.9,1,1.16,1.18,1.19,1.2)
z <- c(1.4,1.42,1.43,1.44,1.45,1.46)
###Â Student's t-test
# for help in R type ?t.test()
# defaults are:
# alternative = "two.sided" i.e. two-sided t-test
# var.equal = FALSE i.e. unequal variance
# note:
# na.rm = TRUE removes missing values
# $p.value gives the p-value for the test
t.test(x, y, na.rm=TRUE, paired=FALSE)$p.value
# gives 0.5026467
t.test(x, z, na.rm=TRUE, paired=FALSE)$p.value
# gives 0.0003166352
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