Pearson's correlation between two binary outcomes takes values between two bounds defined according to the probabilities of the binary outcomes. This function calculates the lower bound of the correlation based on the probabilities of two binary outcomes.
numeric parameter, probability of the event E1
numeric parameter, probability of the event E2
Returns the minimum value that the correlation between the two outcomes can take.
lower_corr returns a numeric value between -1 and 0.
CompAREdesign::lower_corr(p_e1=0.1, p_e2=0.6)#>  -0.4082483