運算式 4: "v" Subscript, "a" "r" , Baseline equals StartFraction, Start sum from "a" Subscript, 1 , Baseline equals 1 to "n" , end sum, left parenthesis, "d" Subscript, "a" "t" "a" , Baseline left bracket, "a" Subscript, 1 , Baseline , right bracket minus "m" Subscript, "n" , Baseline , right parenthesis squared Over "n" minus 1 , EndFractionvar=n∑a1=1dataa1−mn2n−1
equals=
7.6 4 1 0 2 5 6 4 1 0 37.64102564103
4
運算式 5: variance left parenthesis, "d" Subscript, "a" "t" "a" , Baseline , right parenthesisvardata
