The rate (gallons per day) at which a pond loses water due to evaporation from one day after observation has started is give by w(t)=1/t2 (squared). where t is the number of days after the first day. suppose we want to find out what the trend is for the total change in gallons in the pond. (fill in the following table)t is the number of days after the first day, and w is the number of gallons. t: 1 2 10 50 100 200 500 1000w(t): ? ? ? ? ? ? ? ?

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.