السؤال 7
الوسيط للبيانات الاولية والتي عددها فردي هو:
a.
1 over 2 open parentheses X subscript n over 2 end subscript plus X subscript fraction numerator n plus 2 over denominator 2 end fraction end subscript close parentheses
b.
fraction numerator begin display style sum from i equal 1 to n of end style x subscript i over denominator n end fraction
c.
X subscript fraction numerator left parenthesis n plus 1 right parenthesis over denominator 2 end fraction end subscript
d.
fraction numerator begin display style sum from i equal 1 to h of end style x subscript i f subscript i over denominator n end fraction