Discussion
Researchers should test ............ when they carry out research studies.
Answer: A
Researchers should test the null hypothesis.
Statistical testing works by assuming no effect or no difference (the null hypothesis) and asking whether the data are unlikely enough under that assumption to reject it. The research or alternative hypothesis is supported indirectly, by rejecting the null.
The alternative and research hypotheses state the expected effect, but they are not what the test directly evaluates. 'Statistical hypothesis' is the general term covering both the null and the alternative.
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