4. For the following table of data values: [10 marks] X Y X2 Y2 XY 99.2 7 86.3 5 65.8 32.5 1 19.8 a. Calculate
4. For the following table of data values: [10 marks] X Y X2 Y2 XY 99.2 7 86.3 5 65.8 32.5 1 19.8 a. Calculate the value of the linear correlation coefficient, r. (rounded to 3 decimal places) b. At the 0.05 level of significance, does correlation exist? (Justify your answer)
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