title: Comparison of 2 means (independent z test or independent t test).
authors.affiliation: Private practice, Corfu, Greece; visiting assistant professor, Department of Orthodontics and Dentofacial Orthopedics, Faculty of Medicine, University of Bern, Bern, Switzerland.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Pandis
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002648:Child; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D008297:Male; D016011:Normal Distribution; D011336:Probability; D012737:Sex Factors; D013223:Statistics as Topic; D055815:Young Adult