In Exercises 20 and 26, we looked at the birth orders and college choices of some Intro Stats students. For these students:
a) Are enrolling in Agriculture and Human Ecology disjoint? Explain.
b) Are enrolling in Agriculture and Human Ecology independent? Explain.
c) Are being firstborn and enrolling in Human Ecology disjoint? Explain.
d) Are being firstborn and enrolling in Human Ecology independent? Explain.

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Birth Order 1 or Only 2 or More Total 57 Arts &Sciences 34 23 Agriculture 52 41 93 Human Ecology 15 28 Other Total 12 18 30 113 110 22