以下代码中α=0.02
ltx1=[4.5,8.0,5.0,2.0,3.5,5.5,5.0,7.5,5.5,7.5]
ltx2=[3.0,5.0,2.0,4.0,5.0,5.0,3.0,3.0]
def compute(ltx):
le=len(ltx)
sum=0
S=0
for i in range(0,le):
sum+=ltx[i]
avg=sum/le
print('avg:',avg)
for i in range(0,le):
S+=(ltx[i]-avg)*(ltx[i]-avg)
s=S/(le-1)
print('s²:',s)
return s
s1=compute(ltx1)
s2=compute(ltx2)
#查表F0.01(9,7)=6.72
#查表F1-0.01(9,7)=1/(5.61)
se1=s1/s2*(1/6.72)
se2=s1/s2*5.61
print('σ₁²/σ₂²的置信区间为',(se1,se2))