Question: If we use the same population and expected difference and variation for two studies, which study will require a larger sample size: one done with
If we use the same population and expected difference and variation for two studies, which study will require a larger sample size: one done with 80% power or one done with 90% power when alpha (type I error) is set at 0.05? Select one.
a) the one designed with 80% power
b) the one designed with 90% power
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