Correlation and regression differ in that Oa. stats for correlation is Pearson's R. stats for regression is Y = bx+a Ob. correlation measures the direction and size of the relationship between two variables. regression is used for prediction. c. both of them are correct O d. neither of these are true QUESTION 9 Using Sign Test, if obtained probability from an experiment equals 0.003 and a = 0.05 (both two-tailed), what would you conclude? a. reject null hypothesis (H0) Ob.reject alternative (H1) Oc. retain null hypothesis (H0) Od. retain alternative hypothesis (H1)