Chapter 13 Chapter Exercises Using Life Expectancy data set - Do the following: Create a scatterplot and comment on the relationship between "life expectancy" and "happiness level" Compute correlation and test for significance - Conduct linear regression using R or Excel to estimate the "life expectancy" using "happiness level" as the independent variable The output from all of these things should be used to answer the following questions: a. Does there appear to be a relationship between life expectancy and happiness level when assessing the scatterplot? b. What is the correlation between life expectancy and happiness level? c. What is the pvalue for the correlation test between life expectancy and happiness level? d. Is the correlation between life expectancy and happiness level significant at an alpha=0.05? c. Type out the regression equation. f. What is the life expectancy if happiness level is equal to (? g. Is this value significant at an alpha=0.05? h. How much does life expectancy increase for every 1-point increase in happiness level? i. Is this value significant at an alpha 0.05? j. In parth, what you gave was the average increase in life expectancy per 1-point increase in happiness level. How high could this amount be? k. How low could this amount be? 1. How much variation in life expectancy can be explained by happiness level