8. Let a1 0, a2 0, with a1 a2 a. Then a. Use this equation

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8. Let a1 0, a2 0, with a1  a2 

a. Then

a. Use this equation to derive a more general expression for a 100(1 a)% CI for m of which the interval (8.5) is a special case.

b. Let a  .05 and a1  a/4, a2  3a/4. Does this result in a narrower or wider interval than the interval

(8.5)?

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