Answer:
D. 1,80
Step-by-step explanation:
To solve this first we need the formula for standar devation
s=sqrt((n(∑x²)-(∑x)²)/n(n-1)
Then we need ∑x and ∑x²
∑x=2+4+5+5+6,8=22,8
∑x²=2²+4²+5²+5²+6,8²=116,24
s=sqrt((5(116,24)-(22,8)²/5(5-1)
s=sqrt(3,058=
s=1,75=1,8
