3.2 Suppose that Nqobile is at the airport waiting to welcome her friend. The announcement says that the flight is expected to land within 15 to half an hour minutes. Based on the above scenario, compute the probability that the flight lands in no more than 23 minutes of the announcement time.

3.3 If 1.96 z 1.96 defines the limits for the region of acceptance of a two-tailed hypothesis test and z-stat = -1.974, what statistical conclusion can be drawn from these findings?