The assumption in which the variable
A is not statistically differ from the
variable B.
Example 1. The coin guessing experiment
H0 is that the probability of a correct guess is chance level ( = .5)
Example 2. A correlational design
H0 is that there is no correlation between the two measured variables
(r = 0). (the correlation between SAT and College GPA.)
H0
Example 3. An experimental design
H0 is that the mean score on the dependent variable is the same in all
experimental group (helping behavior between men and women)
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