The following table is based on a sample conducted to study political partisanship of high school seniors and their parents.
Parent Party Rep. Dem.
Rep. 604 245
Dem. 130 235
(a) What is the total sample size?
(b) What is the percentage of students who identify as Democrats? The percentage of parents?
(c) What is the percentage of students who share the same party identification as their parents?
(d) If Democratic identification is coded as 1 and Republican as 0, what is the regression line that relates student's identification (dependent variable) to parent's identification (explanatory variable)? Report the slope and intercept.
(e) Based on this data, can we say if the relationship is causal? Explain your answer.