3. A driving instructor with 7 students gives both a written test and a road test at the end of instruction. She is interested if written test scores are a good predictor of driving test scores. Her data are listed before. Answer all of the following questions: a. Decide and report which variable is independent and which is dependent. On your own paper (do not need to upload) draw the scatterplot. Does the scatterplot suggest a linear relationship? How can you tell? b. Calculate the regression line statistics (slope, y-intercept) and plot the line (don't have to upload). Report the three hypothetical X values and their corresponding Y values. c. Calculate and report the Pearson's r correlation coefficient. d. Using the 5 steps of hypothesis testing, address the hypothesis that a higher written test score is related to a higher driving test score.

Written Test Road Test Score Score 78 94 71 82 79 91 74 91 87 95 83 97 89 95 n = 7