Birth order revisited Consider again the data on birth order and college majors in Exercise 28.  a) What is the marginal distribution of majors? b) What is the conditional distribution of majors for...

Birth order revisited Consider again the data on birth order and college majors in Exercise 28.

 a) What is the marginal distribution of majors?

b) What is the conditional distribution of majors for the oldest children?

c) What is the conditional distribution of majors for the children born second?

d) Do you think that college major appears to be independent of birth order? Explain.