Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have mean diameter of 126 millimeters, and a variance of 64. If a random sample of 37 steal bolts. is selected, what is the probability that the sample mean would be greater than 128.6millimeters? Round your answer to four decimal plates.

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.