Data was collected on a sample of seven students from Professor Barry’s Statistics class last semester. The data shows for each of the seven students the number of absences they had in this course x and their final grade in this course y.
| Student | Number of absences x | Final Grade y |
| A | 6 | 82 |
| B | 2 | 86 |
| C | 15 | 43 |
| D | 9 | 74 |
| E | 12 | 58 |
| F | 5 | 90 |
| G | 8 | 78 |
- Make a scatterplot of number of absences versus final grade.
- Compute the value of the correlation coefficient r .
- Find the critical value in Table II from Appendix A for the given sample size.
- Use the answers to parts a and b to determine if a linear relationship exists between number of absences and final grade.
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