Calculate r, the correlation coefficient ________________ b) Find the equation of the regression line __________________________________ c) If a student is absent 4 times,, what grade does your regression line predict?_
Calculate r, the correlation coefficient ________________ b) Find the equation of the regression line __________________________________ c) If a student is absent 4 times,, what grade does your regression line predict?_
Calculate r, the correlation coefficient ________________ b) Find the equation of the regression line __________________________________ c) If a student is absent 4 times,, what grade does your regression line predict?_
The following table shows students’ number of absences, x, and the student’s final grade,, y.
# of absences x 6 2 15 9 12 5 8 Final grade y 82 86 43 74 58 90 78
a) Calculate r, the correlation coefficient ________________
b) Find the equation of the regression line __________________________________
c) If a student is absent 4 times,, what grade does your regression line predict?__________________
Definition Definition Statistical measure used to assess the strength and direction of relationships between two variables. Correlation coefficients range between -1 and 1. A coefficient value of 0 indicates that there is no relationship between the variables, whereas a -1 or 1 indicates that there is a perfect negative or positive correlation.
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