10.20 Blue jay morphology: Sex and size. The dataset in the le BlueJays includes Head (head length, in mm) and Mass (in gm) for a sample of blue jays. We want to study the relationship between sex (coded as M/F in the variable KnownSex and as 1 / 0 in the variable Sex) and these measurements. TI aIuJav a. Make parallel boxplots of Head by KnownSex and Mass by KnonmSex. Which of these two predictors has the strongest relationship with KnownSex? b. Fit a simple logistic regression model on Sex depending on Mass. What is the P- value for testing that Mass has no predictive power? c. Fit a multiple logistic regression model of Sex depending on Mass and Head. Which is the P-value for the coefcient of Mass in the multiple logistic model