(b) The table below shows the number of absences, x, in a Statistics course and the...

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(b) The table below shows the number of absences, x, in a Statistics course and the final exam grade, y, for 8 students. [2] 2 90 4 3 3 7 y 95 90 55 70 80 85 54 Necessary calculations: You may need to find the following quantities to answer the following questions: E, xi =?, E, x? =?, E, Yi =?, E, y? =?, and , xiyi =?. (i) Draw a scatter diagram for the variables x and y and hence indicate what type of relationship exist between them. (ii) Find the sample correlation coefficient and interpret your result. (b) The table below shows the number of absences, x, in a Statistics course and the final exam grade, y, for 8 students. [2] 2 90 4 3 3 7 y 95 90 55 70 80 85 54 Necessary calculations: You may need to find the following quantities to answer the following questions: E, xi =?, E, x? =?, E, Yi =?, E, y? =?, and , xiyi =?. (i) Draw a scatter diagram for the variables x and y and hence indicate what type of relationship exist between them. (ii) Find the sample correlation coefficient and interpret your result.