Question

Calcule as médias aritméticas dos valores apresentados a seguir:
a) 12 e 16
b)8,9 e 10
c) 14 , 24 , 34 e 44

Answer 1

a) 12+16= 28 ÷ 2 = 14.
b)8+9+10= 27 ÷ 3 = 9.
c) 14+24+34+44= 116 ÷ 4 = 29.

Answer 2

$\bar{x} = \frac{12+16}{2} \\ \bar{x} = \frac{28}{2} \\ \bar{x} =14$



$\bar{x} = \frac{8+9+10}{3} \\ \bar{x} = \frac{27}{3} \\ \bar{x}=9$



$\bar{x} = \frac{14+24+34+44}{4} \\ \bar{x} = \frac{116}{4} \\ \bar{x}=29$