The parking charges at a shopping center were $2 for the first hour and $d for every hour or part of an hour after that. calvin parked his car at the shopping center from 2: 30 p. m. to 5: 10 p. m. how much did he have to pay for parking?

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.