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In hypothesis testing, the null hypothesis is a statement of

A

What the experiment is trying to prove or show by applying some kind of treatment on one or more variables.

B

The probability of obtaining the experimental results purely by chance.

C

The validity of the experiment.

D

No difference from what one would normally expect if there were no effect of the experimental treatment.

E

The relative effectiveness of a treatment applied to a randomly selected group of subjects.

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