What is practical significance? What is statistical significance? Can you have practical significance from the results of your evaluative study if you do not have statistical significance? Explain.
What will be an ideal response?
Ans: Practical significance refers to whether the data results are noteworthy from a practical or clinical perspective: Is this amount of client gain enough, or is it disappointing? Statistical significance refers to whether the data can be explained by chance. If data can be explained by chance, we cannot take them seriously. We should conclude that the clients did not improve, rather than that they improved only a small amount. Thus, we should not report that our data were of practical significance if they were not statistically significant.
Learning Objective: 8-10: Determine if a given set of data supported a given evaluative study hypothesis with attention to the two criteria for this endeavor.
Cognitive Domain: Application
Answer Location: Practical Significance
Difficulty Level: Hard
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