from math import sqrt

lst = [
    9.7,
    9.8,
    10.1,
    10,
    9.9,
    8.0,
]

trungbinh = sum(lst) / len(lst)
epsilon = []
print(trungbinh)
for i in range(len(lst)):
    ep = abs(lst[i] - trungbinh)
    epsilon.append(ep)

denta = sqrt(pow(sum(epsilon),2) / (len(lst) - 1))
for i in range(len(epsilon)):
    if epsilon[i] > denta:
        print(f"{lst[i]} la so sai")