Suppose that a recent poll found that 52​% of adults believe that the overall state of moral values is poor. Complete parts​ (a) through​ (c). ​(a) For 150 randomly selected​ adults, compute the mean and standard deviation of the random variable​ X, the number of adults who believe that the overall state of moral values is poor. The mean of X is nothing.​ (Round to the nearest whole number as​ needed.) The standard deviation of X is nothing. ​(Round to the nearest tenth as​ needed.) ​(b) Interpret the mean. Choose the correct answer below. A. For every 150 ​adults, the mean is the minimum number of them that would be expected to believe that the overall state of moral values is poor. B. For every 150 ​adults, the mean is the range that would be expected to believe that the overall state of moral values is poor. C. For every 78 ​adults, the mean is the maximum number of them that would be expected to believe that the overall state of moral values is poor. D. For every 150 ​adults, the mean is the number of them that would be expected to believe that the overall state of moral values is poor. ​(c) Would it be unusual if 71 of the 150 adults surveyed believe that the overall state of moral values is​ poor? Yes No