Consider the visits that result in leave without being seen (LWBS) at an emergency department in Example 2-8. Assume that four visits that result in LWBS are to be randomly selected (without replacement) for a follow-up interview. (a) What is the probability that all selected visits are from Hospital 4 ? (b) What is the probability that no selected visits are from Hospital 4 ? (c) What is the probability that all selected visits are from the same hospital? | Numerade

A hospital emergency department (ED) studied factors that it thought had an effect on the number of patients who left without being seen (LWBS). It analyzed n = 164 24-hour observation periods using six binary predictors representing days of the week, daily occupancy rate, and number of patients presenting to the ED. The fitted regression equation was LWBS = 1.87 1.19Mon − 0.187Tue − 0.785Wed − 0.580Thu − 0.451Fri − 0.267Sat 0.078Occ 0.025#PatPres (SE = 6.18, R2 = .294, S adj2 =