Σύγκριση μεθόδων

	Περιγραφική Στατιστική	Ανεξάρτητος δειγματικός t-έλεγχος
Πεδίο	Στατιστική	Στατιστική
Οικογένεια	Hypothesis test	Hypothesis test
Έτος προέλευσης	1977	1908
Δημιουργός	John W. Tukey	Student (W. S. Gosset)
Τύπος	Summary procedure	Parametric mean comparison
Θεμελιώδης πηγή	Tukey, J.W. (1977). Exploratory Data Analysis. Addison-Wesley. ISBN: 978-0201076165	Student (1908). The probable error of a mean. Biometrika, 6(1), 1–25.
Εναλλακτικές ονομασίες	summary statistics, exploratory data summary, Betimsel İstatistik	student t-test, two-sample t-test, unpaired t-test, bağımsız örneklem t-testi
Συναφείς	6	4
Σύνοψη	Descriptive statistics is a set of procedures that numerically and visually summarises the essential characteristics of a dataset: central tendency (mean, median, mode), spread (standard deviation, interquartile range), shape (skewness, kurtosis), and frequency distributions. Systematised for applied data analysis by John W. Tukey in his 1977 work on Exploratory Data Analysis, descriptive statistics serves as the indispensable first step before any inferential or modelling procedure.	The independent samples t-test is a parametric hypothesis test that compares the means of two independent groups to decide whether they differ significantly. It builds on the t-distribution introduced by Student (W. S. Gosset) in 1908 and assumes the measured values are continuous, approximately normally distributed, and have equal variances.