l Standard normal distribution An exampl It has been reported that the average hotel check-in time from curbside to delivery of bags into the room, is 12.1 minutes. Mary has just left the cab that brought her to her hotel. Assuming a normal distribution with a standard deviation of 2.0 minutes what is the probability that the time required for Mary and her bags to get to the room will be a) greater than 14.1 minutes? b)less than 8.1 minutes? c between 10.1 and 14.1 minutes? d) between 10.1 and 16.1 minutes? o 2002 The Wadsworth GroupStandard Normal Distribution: An Example • It has been reported that the average hotel check-in time, from curbside to delivery of bags into the room, is 12.1 minutes. Mary has just left the cab that brought her to her hotel. Assuming a normal distribution with a standard deviation of 2.0 minutes, what is the probability that the time required for Mary and her bags to get to the room will be: a) greater than 14.1 minutes? b) less than 8.1 minutes? c) between 10.1 and 14.1 minutes? d) between 10.1 and 16.1 minutes? © 2002 The Wadsworth Group