Question: 4. Consider the information given in Exercise 2 in Section 4.2. (a) What is the conditional PMF of the number of tumors for a randomly

4. Consider the information given in Exercise 2 in Section 4.2.

(a) What is the conditional PMF of the number of tumors for a randomly selected rat in the 1.0 mg/kg drug dosage group?

(b) Find the regression function of Y, the number of tumors present on a randomly selected laboratory rat, on X, the amount of drug administered to the rat.

(c) Use the Law of Total Expectation to find E(Y).

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