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Student exam score (marks) and the number of classes they attended in the trimester were recorded for a subject. Excel was used to investigate the potential linear relationship between these two variables. A section of the summary output is provided below: Regression statistics Multiple R 0.63 R square 0.3969 Observations 7O Coefficients Standard Error Intercept 13.11 7.26 Attendance 8.11 1.86 What is the value ofthe slope? Give your answer correct to two decimal places. Do NOT include units