Consider the four data sets shown below. (a) Compute the linear correlation coefcient for each data set.

Consider the four data sets shown below.

(a) Compute the linear correlation coefficient for each data set.
(b) Draw a scatter diagram for each data set. Conclude that linear correlation coefficients and scatter diagrams must be used together in any statistical analysis of bivariate data.

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Data Set 1 Data Set t2 Data Set 3 Data Set 4 10 8.04 8 6.9 13 7.58 9 8.81 11 8.33 14 9.96 6 7.24 4 4.26 12 10.84 7 4.82 5 5.68 10 9.14 10 7.46 8 6.77 13 8.74 13 12.74 9 7.11 11 9.26 11 7.81 14 8.10 14 8.84 6 6.08 4 5.39 12 9.13 12 8.15 7 6.42 8 6.58 8 5.76 8 7.71 8 8.84 8 8.47 8 7.04 8 5.25 8 5.56 8 7.91 8 6.89 5 5.73 19 12.50 8 8.14 9 8.77 6 6.13 4 3.10 7 7.26 5 4.47