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Comparing the Lifetimes of Two Brands of Batteries
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Dunn, Peter K. – Journal of Statistics Education, 2013
In this paper, we report a case study that illustrates the importance in interpreting the results from statistical tests, and shows the difference between practical importance and statistical significance. This case study presents three sets of data concerning the performance of two brands of batteries. The data are easy to describe and…
Descriptors: Equipment, Performance, Statistical Analysis, Statistical Significance
Claims of Improved Academic Performance--The Questions You Should Ask.
Smith, Richard Alan – Computing Teacher, 1988
Discusses how to examine and evaluate claims of improved academic performance in advertisements for computer-assisted instruction. Highlights include the proper use of comparison groups; types of statistical analyses; the Hawthorne effect; the interpretation of scores; interpreting graphic presentations; tests of significance; and cost…
Descriptors: Academic Achievement, Achievement Gains, Advertising, Comparative Analysis