Determine whether the probabilities on the following page are computed using classical methods, empirical methods, or subjective methods.
(a) The probability of having eight girls in an eight-child family is 0.390625%.
(b) On the basis of a survey of 1000 families with eight children, the probability of a family having eight girls is 0.54%.
(c) According to a sports analyst, the probability that the Chicago Bears will win their next game is about 30%.
(d) On the basis of clinical trials, the probability of efficacy of a new drug is 75%.