Średnia arytmetyczna skoków skoczka:

$\frac{130+120+100+126+124}{5}\left[\text{m}\right]=\frac{600}{5}\left[\text{m}\right]=120\left[\text{m}\right]$     

Odchylenie standardowe:

${\delta }^2=\frac{x_1^2+x_2^2+\dots +x_5^2}{5}-{120}^2$  

${\delta }^2=\frac{{130}^2+{120}^2+{100}^2+{126}^2+{124}^2}{5}-14400$  

${\delta }^2=\frac{16900+14400+10000+15876+15376}{5}-14400$  

${\delta }^2=\frac{72552}{5}-14400$  

${\delta }^2=14510,4-14400$  

${\delta }^2=110,4$  

$\delta =\sqrt{110,4}$  

$\delta =10,5071\dots$  

$\delta \approx 10,51$  

 

Odp. D