수식 8: "y" equals "a" left brace, left bracket, "Q" Subscript, 0 , Baseline , "Q" Subscript, 3 , Baseline , right bracket less than or equal to "x" less than or equal to left bracket, "Q" Subscript, 1 , Baseline , "Q" Subscript, 4 , Baseline , right bracket , right bracey=aQ0,Q3≤x≤Q1,Q4
8
수식 9: "x" equals left bracket, "Q" Subscript, 1 , Baseline , "Q" Subscript, 2 , Baseline , "Q" Subscript, 3 , Baseline , right bracket left brace, "a" minus "b" less than or equal to "y" less than or equal to "a" plus "b" , right bracex=Q1,Q2,Q3a−b≤y≤a+b
9
수식 10: "y" equals left bracket, "a" plus "b" , "a" minus "b" , right bracket left brace, "Q" Subscript, 1 , Baseline less than or equal to "x" less than or equal to "Q" Subscript, 3 , Baseline , right bracey=a+b,a−bQ1≤x≤Q3
