title: A Description of the Appropriate Use of Student's t-Test.
abstract: This is the second in a series of articles devoted to a simplified description of experimental design, statistical analysis, and interpretation. The present article deals with the proper use of Student's t-test. Examples are provided of nutritional experiments in which a two-tailed Student's t-test may be properly applied and a second example in which the F-test in the analysis of variance is more useful.
authors.affiliation: a Clinical Trials and Biometry Unit, LSU Eye Center , New Orleans , LA 70112 , USA.
authors.forename: H W
authors.initials: HW
authors.lastname: Thompson
authors.affiliation: b Section of Biostatistics, Stanley S. Scott Cancer Center , New Orleans , LA 70112 , USA.
authors.forename: R
authors.initials: R
authors.lastname: Mera
authors.affiliation: c Section of Endocrinology, Department of Medicine, LSU Medical Center , New Orleans , LA 70112 , USA.
authors.forename: C
authors.initials: C
authors.lastname: Prasad
keywords: Analysis of variance; Experimental design; One-tailed t-test; Two-tailed t-test