A
researcher measures participants’ anxiety levels before and after a mindfulness
intervention. What is the appropriate null hypothesis for a dependent samples
t-test?

Question

Answer

The difference in anxiety levels between participants is due to random assignment.

Answer

The mean anxiety level before the intervention is greater than the mean after the intervention.

Answer

The mean anxiety level before the intervention is equal to the mean after the intervention.

Answer

The mean anxiety level of participants in the intervention group is equal to that of a separate control group.

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A researcher measures participants’ anxiety levels before and after a mindfulnes...

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