returns the chi-square statistical score of the collocation . concode_field_sep double score concode_elem_sep String w1 concode_elem_sep String w2 concode_elem_sep int frequency concode_field_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String w1 concode_elem_sep String toString concode_elem_sep String w2 concode_elem_sep int compareTo concode_elem_sep int frequency
double function ( ) { return score ; }