Question

please answer all question 9-11

Question 9 2 pts z scores are useful because they: o reduce the probability of Type I and Type Il errors, allow permit the transformation of raw scores into percentiles. o transform linear scores into nonlinear scores, convert nonlinear scores back into linear scores, and allow us to obtain comparisons between nonlinear and linear scores. Pelation to the mean of its underlying population allow comparisons to be made between stores from different distributions, and permit the transformation of z scores into percentiles. o allow us to conyert raw scores to mean scores, compare scores from different samples, and transform populations into samples. Question 10 2 pts The correlation coefficient between class attendance (x) and number of problems missed on an exam (y) is (-0.77). Which statement regarding this finding is correct? o The correlation demonstrates causality. o There is no causal relationship between the two variables. o If you attend class regularly, you are more likely class regularly. o If you start attending class more regularly, the number of problems you miss on the next exam is certain to be increased. D Question 11 2 pts Researchers were interested in analyzing whether reaction time predicted memory score. Reaction Time Mean (X) = 2.55, SD = 0.75 Memory Score Mean (Y) = 7.49, SD = 1.58 r = 0.56, N = 31 Select the formula you would use to begin calculating the intercept. 0-2.55 0.75 Z = 0.75 2.55-7.40 0-7.40 1.58 O2 = 0.56 (0) +2.55 o 2y = 0.56 (0.75) +2.55

Answer 1