Question: Table 1.9 (attached) on page 39 of your textbook (Introduction to the Practice of Statistics, by Moore et. al. 5^th edition) (table 1.6 if you are using the 4^th edition) reports data on 78 seventh-grade students (OBS, GPA, IQ, Gender, Self-concept). Some people think that self-concept is related to school performance.

(a) (10pts) Use Excel to make a scatterplot of school GPA against self-concept score.

(b) (5pts) Describe the overall pattern that you see. Does it make sense to use the correlation as a summary?

(c) (10pts) Using Excel (correl or data analysis-correlation), find the correlation coefficient, r, and interpret its value in words (strong or weak, positive or negative association, any other comment?)