Find legitimate to use a directional hypothesis

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If H0 is in reality false and it is legitimate to use a directional H1, which of the following will yield a more powerful test?

1. one-tailed alternative hypothesis
2. one-tailed or two-tailed alternative hypothesis will yield the same power
3. two-tailed alternative hypothesis
4. type of alternative hypothesis has no effect on power.

 

Reference no: EM13142844

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