Using Appendix Data Set or the file ADD.dat on the Web site, a. What is the probability that a person drawn at random will have an ADDSC score greater than 50 if the scores are normally distributed...

Using Appendix Data Set or the file ADD.dat on the Web site,

a. What is the probability that a person drawn at random will have an ADDSC score greater than 50 if the scores are normally distributed with a mean of 52.6 and a standard deviation of 12.4?

b. What percentage of the sample actually exceeded 50?