1) Are hypotheses tested concerning the actual values of the coefficients (i.e. B) or their estimated values (i.e. B) and why? 2) Let Z be a random variable with a distribution such that P(Z = 2) = P(Z = 0) = 0.5 Let (Z1, Z2, Zn) be a random sample from the same distribution as Z. Consider the following estima- tor for the mean of Z: ê(Z1, Z2, ..., Zn) = Z1 x) Is unbiased? Is A consistent?