A fictional data set comparing age and average hours of sleep each night is shown below. The Z-scores and sum of Z*Z values is also given. Hours of Age Z(age) Z(sleep) Z*Z Sleep 14 6 -1.2681212 -1.200734 1.52267629 14 6 -1.2681212 -1.200734 1.52267629 15 6.5 0.8779301 -0.6197337 0.54408284 17 6.5 0.0975478 -0.6197337 0.06045365 18 8 0.29264336 1.12326729 0.32871672 19 7.5 0.68283452 0.54226697 0.3702786 21 8 1.46321682 1.12326729 1.64358359 21 8.5 1.46321682 1.70426761 2.49371304 16 6.2 0.4877389 -0.9683339 0.47229414 17 7 -0.0975478 -0.0387334 0.00377835 20 7.6 1.07302567 0.65846703 0.70655203 15 6.6 -0.8779301 -0.5035336 0.44206731 Mean 17.25 7.033333333 SUM 10.1108729 STDEV 2.56284643 0.86058472 What is the correlation value 'r'? Round your answer to four decimal places