e-Articles (Chapter 7)
Here are some full-length research articles that illustrate concepts related to hypothesis testing. To view any article, simply click on its title. (NOTE: No claim is made that these articles are perfect in all respects. By carefully reviewing them, you will hone your skills at being able both to decipher and to critique statistically-based research reports.)
In this description of a planned study, the researchers articulate in words three null hypotheses. One of these was connected to the investigators' primary research hypothesis. The other 2 null hypotheses were connected to their secondary research hypotheses. See the portion of the "Methods" section called "Hypotheses."
In this article reporting on the results of a correlational study, the authors present their research hypotheses, they articulate the null and alternative hypotheses they investigated, they explain the meaning of p, and they point out how a calculated value is used to determine if a given r is or is not significant. See the portion of section 2.3 called "Correlation analysis."
In this study of teeth, toothpaste, and mouthwash, the hypothesis testing procedure was used several times. Included in this research report are the terms: "null hypothesis," "a = .05," "statistically significant difference," "significantly more effective," "were not statistically significantly different," "p < .05," "p < .01," and "p < .001."
(This study is unusual in that data came from the measurement of 45 third molars; however, only one person received the study's toothpaste, mouthwash, and control substance.)
Copyright © 2012
Schuyler W. Huck