%0 Journal Article %1 RivasRuiz2013 %A Rivas-Ruiz, Rodolfo %A Pérez-Rodríguez, Marcela %A Talavera, Juan O %D 2013 %J Revista médica del Instituto Mexicano del Seguro Social %K AnalysisofVariance BiomedicalResearch Judgment Models Statistical %N 3 %P 300-3 %T Clinical research XV. From the clinical judgment to the statistical model. Difference between means. Student's t test. %U http://www.ncbi.nlm.nih.gov/pubmed/23883459 %V 51 %X Among the test to show differences between means, the Student t test is the most characteristic. Its basic algebraic structure shows the difference between two means weighted by their dispersion. In this way, you can estimate the p value and the 95 % confidence interval of the mean difference. An essential feature is that the variable from which the mean is going to be calculated must have a normal distribution. The Student t test is used to compare two unrelated means (compared between two maneuvers), this is known as t test for independent samples. It is also used to compare two related means (a comparison before and after a maneuver in just one group), what is called paired t test. When the comparison is between more than two means (three or more dependent means, or three or more independent means) an ANOVA test (or an analysis of variance) it is used to perform the analysis. Abstract available from the publisher. %@ 0443-5117; 0443-5117

@article{RivasRuiz2013, abstract = {Among the test to show differences between means, the Student t test is the most characteristic. Its basic algebraic structure shows the difference between two means weighted by their dispersion. In this way, you can estimate the p value and the 95 % confidence interval of the mean difference. An essential feature is that the variable from which the mean is going to be calculated must have a normal distribution. The Student t test is used to compare two unrelated means (compared between two maneuvers), this is known as t test for independent samples. It is also used to compare two related means (a comparison before and after a maneuver in just one group), what is called paired t test. When the comparison is between more than two means (three or more dependent means, or three or more independent means) an ANOVA test (or an analysis of variance) it is used to perform the analysis. Abstract available from the publisher.}, added-at = {2023-02-03T11:44:35.000+0100}, author = {Rivas-Ruiz, Rodolfo and Pérez-Rodríguez, Marcela and Talavera, Juan O}, biburl = {https://www.bibsonomy.org/bibtex/205a1383373078fdfe1b28d8fa4f84370/jepcastel}, city = {Centro de Adiestramiento en Investigacion Clinica, Coordinacion de Investigacion en Salud, Centro Medico Nacional Siglo XXI, Instituto Mexicano del Seguro Social, Distrito Federal, Mexico, Mexico. rivasrodolfo@gmail.com.}, interhash = {c22cdde26fc4c5c15b1a4fc1507ac36d}, intrahash = {05a1383373078fdfe1b28d8fa4f84370}, isbn = {0443-5117; 0443-5117}, issn = {0443-5117}, journal = {Revista médica del Instituto Mexicano del Seguro Social}, keywords = {AnalysisofVariance BiomedicalResearch Judgment Models Statistical}, note = {7546<m:linebreak></m:linebreak>JID: 101243727; OTO: NOTNLM; ppublish;}, number = 3, pages = {300-3}, pmid = {23883459}, timestamp = {2023-02-03T11:44:35.000+0100}, title = {[Clinical research XV. From the clinical judgment to the statistical model. Difference between means. Student's t test].}, url = {http://www.ncbi.nlm.nih.gov/pubmed/23883459}, volume = 51, year = 2013 }