Beta binomial parameters

Finds the required alpha and beta to give a desired mean and variance of the beta binomal function

find_prior_alpha_beta(n, mean, var)

Arguments

n	the number of trials
mean	desired mean
var	desired variance

Value

alpha and beta for the beta binomial

See also

Other beta_binomial_functions: bb_mean(), dbb(), find_bb_2(), hist_rbb(), pbb(), qbb(), rbb()

Examples

find_prior_alpha_beta(n=100,mean=25,var=5)
#>    a    b 
#>  -34 -102