لوسط الحسابي للبيانات الاولية هو:
a.
fraction numerator begin display style sum from i equal 1 to n of end style x subscript i f subscript i over denominator n end fraction
b.
fraction numerator L plus U over denominator 2 end fraction
c.
X subscript fraction numerator n plus 1 over denominator 2 end fraction end subscript
d.
fraction numerator begin display style sum from i equal 1 to n of end style x subscript i over denominator n end fraction