title: Problems with the paired t formula in some introductory statistics books.
abstract: Six different formulas for the paired t were found in introductory statistics books. Five are correct. An example shows how using the incorrect formula can result in the wrong research conclusion.
authors.affiliation: Long Beach VA Healthcare Systems, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Charter
mesh_terms: D006801:Humans; D013223:Statistics as Topic / Q000193:education*; D013664:Teaching Materials / Q000592:standards*