Question
3 6 1 13 10 21 8 4 4 6 85 73 98 96 66 44 58 88 63 77 1) The attendance and marks
3 | 6 | 1 | 13 | 10 | 21 | 8 | 4 | 4 | 6 |
85 | 73 | 98 | 96 | 66 | 44 | 58 | 88 | 63 | 77 |
1) The attendance and marks for ten students are shown below. Each column represents one student. Absences 3 6 1 13 10 21 8 4 4 6 Grade 85 73 98 96 66 44 58 88 63 77 a. State the dependent variable and explain your choice. [1C] b. Complete a scatter plot of these data. Label all axes and indicate the scale. Circle the outlier. Draw the scatterplot below or copy and paste a screen capture from Desmos.[3C] c. Determine the correlation coefficient and the line of best fit. [2A] r = ___________ Equation of the Line of best fit: _______ d. Determine the correlation coefficient and the line of best fit with the outlier removed. [2A] r = ___________ Equation of the Line of best fit: _______ e. A student has 9 absences. Use both models to predict their grade. [2A] Model c: ___________ Model d: ___________ f. A student has a mark of 80. Use both models to predict his/her number of absences. [2A] Model c: ___________ Model d: ___________
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