A sample of n = 25 individuals is selected from a population with a ? = 200 and a ? = 10. A treatment is administered to the sample. If the treatment has a significant effect, then: the sample mean should be close to 200 and should lead you to fail to reject the null hypothesis. the sample mean should be very different from 200 and should lead you to reject the null hypothesis. the sample mean should be close to 200 and should lead you to reject the null hypothesis. the sample mean should be very different from 200 and should lead you to fail to reject the null hypothesis.
Added by Stephen S.
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The null hypothesis states that there is no significant effect of the treatment on the population mean. So, if the treatment has a significant effect, we would want to reject the null hypothesis. Show more…
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