Select all the expressions that show 3.068 written in expanded form. a. 3 × 1 + 0 × ( 1 10 ) + 6 × ( 1 100 ) + 8 × ( 1 1,000 ) b. 3 × 1 + 6 × ( 1 10 ) + 8 × ( 1 100 ) c. 3 × 1 + 0 × ( 1 10 ) + 68 × ( 1 1,000 ) d. 30 × ( 1 10 ) + 68 × ( 1 100 ) e. 30 × ( 1 10 ) + 6 × ( 1 100 ) + 8 × ( 1 1,000 )

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.