P is the probability a value from this distribution lies between a & b. za and zb represent the z-scores of a & b.
7
運算式 8: "P" equals Start integral from "z" Subscript, "a" , Baseline to "z" Subscript, "b" , Baseline , end integral, "N" left parenthesis, "x" , right parenthesis "d" "x" equals 0.8 1 8 5 9 4 6 1 4 1 2P=∫zbzaNxdx
equals=
0.8 1 8 5 9 4 6 1 4 1 20.81859461412
8
運算式 9: "z" Subscript, "a" , Baseline equals StartFraction, left parenthesis, "a" minus "m" , right parenthesis Over "s" , EndFraction equals negative 1za=a−ms
equals=
negative 1−1
9
運算式 10: "z" Subscript, "b" , Baseline equals StartFraction, left parenthesis, "b" minus "m" , right parenthesis Over "s" , EndFraction equals 2zb=b−ms
