Question: Let 1 0, 2 0, with 1 2 . Then P z1 z2 1 a. Use this equation to

Let 1 0, 2 0, with 1 2  . Then P

z1   z2  1  

a. Use this equation to derive a more general expression for a 100(1  )% CI for of which the interval (7.5) is a special case.

b. Let   .05 and 1  /4, 2  3/4. Does this result in a narrower or wider interval than the interval (7.5)?

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