Compare `Z_(1) and Z_(2)`

1.	Compare `Z_(1) and Z_(2)`
Answer» `:. sqrt(v)sqrt(cR((1)/(n_(1)^(2))-(1)/(n_(2)^(2)))).(Z-b)` If `Z` is greater than `v` will be greater, `lambda` will be less `:. lambda_(1) lt lamda_(2)` `:. Z_(1) gt Z_(2)`

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