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  2. Spearman's rank correlation coefficient - Wikipedia

    en.wikipedia.org/wiki/Spearman's_rank_correlation...

    If F(r) is the Fisher transformation of r, the sample Spearman rank correlation coefficient, and n is the sample size, then z = n − 3 1.06 F ( r ) {\displaystyle z={\sqrt {\frac {n-3}{1.06}}}F(r)} is a z -score for r , which approximately follows a standard normal distribution under the null hypothesis of statistical independence ( ρ = 0 ).

  3. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the intrinsic wave impedance of a medium (e.g. the impedance of free space) the partial regression coefficient in statistics, also interpreted as an effect size measure for analyses of variance; the eta meson; viscosity; the Dedekind eta function; energy conversion efficiency; efficiency (physics) the Minkowski metric tensor in relativity

  4. Congeneric reliability - Wikipedia

    en.wikipedia.org/wiki/Congeneric_reliability

    In statistical models applied to psychometrics, congeneric reliability ("rho C") [1] a single-administration test score reliability (i.e., the reliability of persons over items holding occasion fixed) coefficient, commonly referred to as composite reliability, construct reliability, and coefficient omega.

  5. Standard normal table - Wikipedia

    en.wikipedia.org/wiki/Standard_normal_table

    Example: To find 0.69, one would look down the rows to find 0.6 and then across the columns to 0.09 which would yield a probability of 0.25490 for a cumulative from mean table or 0.75490 from a cumulative table. To find a negative value such as -0.83, one could use a cumulative table for negative z-values [3] which yield a probability of 0.20327.

  6. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-210752971.html

    Sigma meaning (TODAY Illustration) Lindsay added, “So they have the ‘alpha’ which is the most successful, the best looking and then they have ‘sigma’ which is the same thing as an alpha ...

  7. List of Sigma Alpha chapters - Wikipedia

    en.wikipedia.org/wiki/List_of_Sigma_Alpha_chapters

    Sigma Alpha is an American professional sorority for agricultural students. [1] It was established at Ohio State University in 1978. [ 2 ] Following are the chapters of Sigma Alpha, with active chapters indicated in bold and inactive chapters in italics .

  8. Fraternities and sororities in Canada - Wikipedia

    en.wikipedia.org/wiki/Fraternities_and...

    Sigma Beta Phi ΣΒΦ: February 29, 2008: University of Ottawa: Black and Social Local Independent 1 Active [45] [46] Sigma Gamma Rho: ΣΓΡ: Sigmas or SGRhos November 12, 1922: Butler University: African-American International NPHC: 1 Active [47] Sigma Lambda Gamma ΣΛΓ: March 15, 2004: University of Waterloo: Social Local Independent 1 ...

  9. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-000158935.html

    Sigma males are “considered ‘equal’ to Alphas on the hierarchy but live outside of the hierarchy by choice,” reads the website. Urban Dictionary adds that sigma “is what all 10 year olds ...