For two parameters, a confidence interval for 1 2 , based on single-sample estimate

For two parameters, a confidence interval for θ₁ − θ₂, based on single-sample estimate θ̂_i, and interval 

Show that it has the general form above of an interval for θ₁ − θ₂.

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|(ô. – ô, – V(ô. - 4,)* + (4. - ô,)°, ô, – ô̟ + V(u, – ô,)° + (ô. – 4,)'). 4(1-4,) и,(1 — и2) и (1 — и,) L(1 - L,) SL п> Su пу п, пу