Use technology to calculate. Explain what you used.

1) An MDM4U teacher claims that s/he knows there is a distinct relationship between a student's math mark and the student's class attendance. To prove the point, the teacher has taken a random sample from last year's class and obtained the following information: Student A B C D E F G H Mark 90 75 55 73 70 85 63 45 # classes missed 2 7 13 9 7 4 13 16 a. Determine the dependent variable. b. Draw the scatter plot. Alternately, you can get the scatter plot from the technology (cut-and-paste, screenshot, etc.). c. Obtain the regression equation. Clearly state this equation. d. Plot the regression line. Alternately, the technology may have already done this for you (if you took your scatter plot from the technology - see part b) e. Interpret the meaning of the regression coefficients a and b in the regression equation yp= ax + b f. Predict the statistics marks for two students who miss 3 classes and 10 classes respectively. (Predict can mean that you read (interpolate/extrapolate) the data from the graph and/or use the equation). g. Compute the coefficient of determination (R2). If the technology determines this for you, state it. h. Compute the coefficient of correlation (r). If the technology determines this for you, state it. i. Clearly state the technology (software, graphing calculator, website) that you used to complete this assignment. j. Which method do you perfer: using technology or calculating by hand? Briefly discuss or explain your reasons. Depending on the technology you choose, this could take between 10 and 30 minutes to complete