Weighs of paper discarded by households each week are normally distributed with a mean of 9.4lb and a standard deviation of 3.2lb. Find the weight that separates the bottom 33% from the top 67%. -7.992 O 10.808 O 10.82 -7.976 The graph of a standard normal distribution is a bell-shaped, unimodal, asymmetric curve True False A survey indicates that for each visit to a supermarket, the time spent by a shopper follows a normal distribution with mean and standard deviation of 45 and 12 minutes, respectively. What is the probability that he will stay in the supermarket for more than 40 minutes? Option 1 A survey indicates that for each visit to a supermarket, the time spent by a shopper follows a normal distribution with mean and standard deviation of 45 and 12 minutes, respectively. What is the probability that he will stay in the supermarket for more than 40 minutes? 0.3372 0.4200 O 0.5800 0.6628