F90 posted a question                        Sep 18, 2014 at 12:58pm 							                                                                                                                                                                                                With what instrument could the predictive  validity of a metric scale (a set of questions) best be determined?
 A. Cronbach's alpha
 B. A correlation-coefficient
 C. Fishers r-to-z test.
 D. With none of the above mentioned instruments