12 2. when you measure the length of an object to the eighth of an inch and again to the fourth of an inch, which measurement is more precise? explain your answer.

3. use the measurements in question 2 above to explain this statement: “when you calculate with measurements, your answer shouldn’t be any more precise than the least precise measurement.” don't answer q2

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.