equality test of two normal distributions
for more information type "vartest2" and "ttest2"
Contents
two samples of mass of the parts
X1= [102 99 101 98 103 104 101 98 100 102]; X2= [101 100 99 100 104 97 102 100 101 98]; alpha=0.05;
f-test: equality of variances of populations H0(s1=s2)
[hf,pf,cif,stats] = vartest2(X1,X2,alpha,'right')
hf =
0
pf =
0.4682
cif =
0.3322 Inf
stats =
fstat: 1.0562
df1: 9
df2: 9
t-test: equality of mean values H0(m1=m2) in case of 'equal' variances (s1=s2)
[ht,pt,cit,statt] = ttest2(X1,X2,alpha,'both','equal')
ht =
0
pt =
0.5143
cit =
-1.2947 2.4947
statt =
tstat: 0.6653
df: 18
sd: 2.0166