Question

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, weighted 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 ration for the two types of monkeys. (C) what inference can be made about the weight of both types of monkeys? Explain.

Answer 1

Howler mean: 17
Spider mean: 14

Answer 2

Given:

howler monkey: {15, 16, 17, 17, 17, 17, 18, 19}

spider monkey: {12, 13, 13, 14, 14, 14, 16, 16}

The mean of the first set (howler monkey) = (15 + 16 + 17 + 17 + 17 +17 + 18 + 19)/ 8

The sum of all weights is divided by the number of monkeys weighed (n = 8)

mean = 17

Do the same for the second set (spider monkey) = 12+ 13 + 13+ 14 + 14+ 14 +14 +16 + 16 / 8

mean = 15.75

The ratio of the two is 17:15.75 or 1.08 is to 1.