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Comprehensive list of the most notable symbols in probability and statistics, categorized by function into tables along with each symbol's meaning and example.
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Formulas. Formula 1: Factorial. n! = n(n − 1)(n − 2)... (1) 0! = 1. Formula 2: Combinations. (n r) = n! ( n − r)! r! Formula 3: Binomial Distribution. X~B(n, p) P(X = x) = (n x)pxqn − x, for x = 0, 1, 2,..., n. Formula 4: Geometric Distribution. X~G(p) P(X = x) = qx − 1p, for x = 1, 2, 3,... Formula 5: Hypergeometric Distribution. X~H(r, b, n)
6 ημέρες πριν · \(\newcommand{\avec}{\mathbf a}\) \(\newcommand{\bvec}{\mathbf b}\) \(\newcommand{\cvec}{\mathbf c}\) \(\newcommand{\dvec}{\mathbf d}\) \(\newcommand{\dtil}{\widetilde{\mathbf d}}\) \(\newcommand{\evec}{\mathbf e}\) \(\newcommand{\fvec}{\mathbf f}\) \(\newcommand{\nvec}{\mathbf n}\) \(\newcommand{\pvec}{\mathbf p}\) \(\newcommand{\qvec}{\mathbf ...
6 ημέρες πριν · \(t_{c}=\frac{\left(\overline{x}_{1}-\overline{x}_{2}\right)-\delta_{0}}{\sqrt{\left(\frac{\left(s_{1}\right)^{2}}{n_{1}}+\frac{\left(s_{2}\right)^{2}}{n_{2}}\right)}}\) Interval for difference between two means with equal variances when sigmas are unknown
Discover the meanings and applications of statistics symbols in this comprehensive guide. From sample symbols to regression symbols, learn it all here.
The analysis of events governed by probability is called statistics. View all of Khan Academy’s lessons and practice exercises on probability and statistics. The best example for understanding probability is flipping a coin: There are two possible outcomes—heads or tails.
Example: The mean of 4 , 1 , and 7 is (4 + 1 + 7) / 3 = 12 / 3 = 4 . Median: The middle number; found by ordering all data points and picking out the one in the middle (or if there are two middle numbers, taking the mean of those two numbers).
