Both samples are large (n130,n230), then 100(1)% CI for 12 is (X1X2)z/2n112+n222. When the
values of 1 and 2 are unknown, they can be replaced with the sample standard deviations s1 and
s2..
Both samples are large n130n230 then 1001 CI for 12 i.pdf
1. Both samples are large (n130,n230), then 100(1)% CI for 12 is (X1X2)z/2n112+n222. When the
values of 1 and 2 are unknown, they can be replaced with the sample standard deviations s1 and
s2.