17. The probability that a difference ( p - Po ) is due merely to random sampling variation, when P = Po . A. Type I error rate B. Type ll error rate C. Power D. p-value 18. Which of the following statistics in a computer print-out for a least-squares linear regression analysis provides the best basis for assessing the strength of the association between the X and Y variables? A. Slope of the regression line (b1) B. Standard error of the regression (s) C. Coefficient of determination (R2 ) D. The F-test statistic in the ANOVA table