Question 5 In a particular city, the annual income of the population is normally distributed with a mean of $62000. If 3.75% of people earn more than Not yet $156000 per year, find (to the nearest dollar) the standard deviation. answered Marked out of Select one: 1.00 O $293750 Flag question O $52809 O $55952 O $84157Question 6 The XPT train from Melbourne to Sydney leaves Melbourne' s Southern Cross Station at 8:30 am and is scheduled to arrive at Sydney Not yet Central Station at 7:47 pm of the same day, a journey of 677 minutes. In fact, the time travelled is normally distributed with a mean of 677 answered minutes and a standard deviation of 1000 123 minutes. Marked out of 1.00 A train is said to be on time if it arrives within 10 minutes of the scheduled time. What percentage of trains are on time? Flag question Select one: O 78.14% O 10.93% O 21.86% O 89.07%