e-Articles (Chapter 10)
Here are the titles of some full-length research articles that illustrate concepts discussed in this chapter. To view any article on-line, simply click on its title.
Illustrates the use of an independent-samples t-test to compare 2 samples in terms of mean pre-post change scores. As indicated in the fourth paragraph of the section entitled "Patients and Methods," this t-test was conducted in a two-sided fashion.
In this study, 451 Dutch childen were measured in terms of their chronological age and also in terms of their biological development as indicated by the "dental age" of their teeth. Separately for boys and girls, the chronological and dental ages were compared, via paired t-tests, for different groups of children who had similar chronological ages. See Table 2 on page 311.
Illustrates the use of an independent-samples t-test to compare the mean gain scores of two groups (treatment and control) that were measured on 2 occasions. Actually, this kind of test was performed 6 times, because the comparison groups were each subdivided in different ways with t-tests used to compare the subgroups.
Shows how a confidence interval on the difference between the means of 2 samples "says" the same thing as a t-test that compares the 2 means. See (1) the second and third sentences of the last paragraph of the "Results" section and (2) the third row of numbers in Table 2.
Illustrates the use of confidence intervals to test a null hypothesis involving a single mean. See (1) the last 2 sentences in the second paragraph of the "Results" section and (2) Note #3 beneath Tables 2 and 3.
Copyright © 2012
Schuyler W. Huck