3. a wildlife refuge in south america has howler monkeys and spider monkeys. a biologist working there randomly selected eight adults of each type of monkey, weighed them, and recorded their weights in pounds. howler monkey: {15, 16, 17, 17, 17, 17, 18, 19} spider monkey: {12, 13, 13, 14, 14, 14, 16, 16} (a) calculate the mean and mad for each type of monkey. (b) calculate the means-to-mad ratio for the two types of monkeys. (c) what inference can be made about the weight of both types of monkeys? explain.