Microsoft Office Tutorials and References
In Depth Information
degrees of freedom: 208
critical t: 1.96 (in Appendix E)
t-test formula: 0.44 (when you use your calculator!)
Result: Since the absolute value of 0.44 is less than the critical t of 1.96, we accept
the null hypothesis.
Conclusion: There was no difference between male and female alumni who were
Biology majors in their satisfaction with the academic experience they had at
State University.
Now, let’s see what happens when you reject the null hypothesis (H 0 ) and accept
the research hypothesis (H 1 ).
5.1.9.2 Writing the Conclusion of the Two-group t-test When You Reject the
Null Hypothesis and Accept the Research Hypothesis
Objective : To write the conclusion of the two-group t-test when
you have rejected the null hypothesis and accepted
the research hypothesis
Let’s continue with this same example, but with the result that we reject the null
hypothesis and accept the research hypothesis.
Let’s assume that this time you have alumni data on 85 males and their mean
score on this question was 7.26 with a standard deviation of 2.35. Let’s further
suppose that you also have data on 48 females and their mean score on this question
was 4.37 with a standard deviation of 3.26.
Without going into the details of the formulas for the two-group t-test, these data
would produce the following result and conclusion based on Fig. 5.5 :
Null Hypothesis:
m 1 ¼ m 2
Research Hypothesis:
m 1 m 2
degrees of freedom: 131
Fig. 5.5 Worksheet Data for Item #10 for Obtaining a Signiﬁcant Difference between Males and
Females
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