PSY 315: Hypothesis Testing
Hypothesis
Testing
PSY/ 315
University of Phoenix
May 2015
What is Hypothesis Testing?
O “[…method for determining the
probability of an observed event that occurs only by chance” (Allua &
Thompson, 2009).
O Two hypothesis types: null and research O Does not prove but suggests that the hypothesis is plausible
O Five steps of the method
Null Hypothesis
O No difference between groups compared
O The difference is null
O In a control and treatment group it states
that the treatment had no effect on the dependent variable (Allua & Thompson,
2009)
O Always tested, even indirectly
O An experiment conclusion always refers to the null, rejecting or accepting it rather than the research hypothesis
Example of Null
Hypothesis
O “H1: Tomato plants
Testing
PSY/ 315
University of Phoenix
May 2015
What is Hypothesis Testing?
O “[…method for determining the
probability of an observed event that occurs only by chance” (Allua &
Thompson, 2009).
O Two hypothesis types: null and research O Does not prove but suggests that the hypothesis is plausible
O Five steps of the method
Null Hypothesis
O No difference between groups compared
O The difference is null
O In a control and treatment group it states
that the treatment had no effect on the dependent variable (Allua & Thompson,
2009)
O Always tested, even indirectly
O An experiment conclusion always refers to the null, rejecting or accepting it rather than the research hypothesis
Example of Null
Hypothesis
O “H1: Tomato plants