Ahotel chain has four hotels in oregon. the general manager is interested in determining whether the mean length of stay is the same or different for the four hotels. she selects a random sample of n = 20 guests at each hotel and determines the number of nights they stayed. assuming that she plans to test this using an alpha level equal to 0.05, which of the following is the correct critical value? (points : 5)f = 3.04approximately f = 2.76t = 1.9917none of these.