1. What does a correlation coefficient signify? What does the value and the sign communicate? 2. Explain the correlation coefficient between discount and unplanned purchases (r=0.98). 3. Explain the scatter plot between discount and unplanned purchases. Is there a linear association between the variables? a Scatter Plot: Discount and Unplanned purhases 12 10 30 SO Oct 4. Are Discount and Unplanned purchases normally distributed? Which statistics we need to check in order to answer this question? 5. The correlation coefficient between discount and unplanned purchases (r=0.98, P-value=0.000) is statistical significant or not? Why? 6. Does a correlation coefficient assume a cause-and-effect relation? Justify your answer with an example