Suppose the statistics department at a large midwestern university has offered the same course in biostatistics for many semesters. Let

be a discrete random variable with values equal to the number of undergraduate students who register each semester. The mean of

is=140undergraduate students and the standard deviation isU=12undergraduate students.

Letbe a discrete random variable with values equal to the number of graduate students who register each semester. The mean ofis=30graduate students and the standard deviation is=graduatestudents.

Compute the mean,+,of the total number of undergraduate and graduate students registered. Give your answer as a wholenumber.

+=

Compute the standard deviation,+,of the total number of undergraduate and graduate students registered. Assume the variablesandare uncorrelated, and report your answer as a wholenumber.

+=