Results 251 to 260 of about 37,249,651 (330)

Mann-Whitney U test and t-test

Journal of Visual Impairment & Blindness, 2023
In this issue of the Journal of Visual Impairment & Blindness (JVIB), the article entitled, “The effect of a training video with audio description on the breast selfexamination of women with visual impairments,” by Çelik and İldan Çalım, notes that some ...
Robert Wall Emerson
semanticscholar   +1 more source

Best practice in statistics: Use the Welch t-test when testing the difference between two groups

Annals of Clinical Biochemistry, 2021
Clinical biochemists often wish to compare two groups of measurements. In order to do so, they must be familiar with Student's t-test. This article provides guidance for the use of the Welch t-test, with subtle but important differences and validity in a
R. West
semanticscholar   +1 more source

The first t‐test

Statistics in Medicine, 1994
AbstractThe data with which Student illustrated the application of his famous distribution are examined from a number of aspects. Central to the discussion is the within‐patient clinical trial at Kalamazoo whose results were published by Cushny and Peebles and misquoted by Student and Fisher. This trial is discussed from historical, pharmacological and
S, Senn, W, Richardson
openaire   +2 more sources

Sequential trimmed t tests

Biometrika, 1980
SUMMARY Sequential trimmed t tests are proposed using the restricted scheme and wedge scheme. The formulations of these plans are given and their performances are compared with the usual restricted and wedge t tests under normality and long-tailed distributions. 1.
Lim, T. K., Fung, Karen Yuen
openaire   +2 more sources

Controlling decision errors with minimal costs: The sequential probability ratio t test.

Psychological methods, 2020
For several years, the public debate in psychological science has been dominated by what is referred to as the reproducibility crisis. This crisis has, inter alia, drawn attention to the need for proper control of statistical decision errors in testing ...
Martin Schnuerch, E. Erdfelder
semanticscholar   +1 more source

T-Test

Definitions, 2020
Breast self-examination (BSE) is an examination technique in which a woman examines her own breasts by looking and feeling with her fingers to detect whether or not there are lumps in her breasts. Knowledge and practice of BSE is a person's knowledge and
F. Dekking, C. Kraaikamp, H. P. Lopuhaä, L. Meester   +3 more
semanticscholar   +2 more sources

Closed sequential t-tests

Biometrika, 1962
Schneiderman & Armitage (1962) described a family of sequential procedures, called 'wedge plans', which could be used for testing the mean ,.t of a normal population with known variance CJ2. For tests of a null hypothesis Ho (that ,.t = 0) against two alternatives H1 (that It = ,t1) and H_1 (that It = -,tl), the boundaries favouring H1 and H_1 (i.e ...
Schneiderman, M. A., Armitage, P.
openaire   +1 more source

Two-Sample t Test

Statistical Methods, 2020
Introduction This procedure provides several reports for the comparison of two continuous-data distributions, including confidence intervals for the difference in means, two-sample t-tests, the z-test, the randomization test, the MannWhitney U (or ...
Cheryl Ann Willard
semanticscholar   +1 more source