repl.txt (1070B)
1 2 {{alias}}( N, K, n ) 3 Returns the variance of a hypergeometric distribution. 4 5 If provided `NaN` as any argument, the function returns `NaN`. 6 7 If provided a population size `N`, subpopulation size `K` or draws `n` which 8 is not a nonnegative integer, the function returns `NaN`. 9 10 If the number of draws `n` or the subpopulation size `K` exceed population 11 size `N`, the function returns `NaN`. 12 13 Parameters 14 ---------- 15 N: integer 16 Population size. 17 18 K: integer 19 Subpopulation size. 20 21 n: integer 22 Number of draws. 23 24 Returns 25 ------- 26 out: number 27 Variance. 28 29 Examples 30 -------- 31 > var v = {{alias}}( 16, 11, 4 ) 32 ~0.688 33 > v = {{alias}}( 2, 1, 1 ) 34 0.25 35 36 > v = {{alias}}( 10, 5, 12 ) 37 NaN 38 > v = {{alias}}( 10.3, 10, 4 ) 39 NaN 40 > v = {{alias}}( 10, 5.5, 4 ) 41 NaN 42 > v = {{alias}}( 10, 5, 4.5 ) 43 NaN 44 45 > v = {{alias}}( NaN, 10, 4 ) 46 NaN 47 > v = {{alias}}( 20, NaN, 4 ) 48 NaN 49 > v = {{alias}}( 20, 10, NaN ) 50 NaN 51 52 See Also 53 -------- 54