Matsakaicin lissafi shine ƙimar da ake yawan amfani dashi a cikin ƙididdiga, wanda aka lasafta shi azaman matsakaicin lissafin ƙimar.
Idan muna da saiti na
n
dabi'u. Bari mu kira su
x1, x2, …, xn.
Don samun matsakaici, ƙara duka
xi
kuma raba sakamakon ta
n.
\(
\overline{x} = \dfrac{x_1 + x_2 + ... + x_n}{n}
\)