Question

Based on the data in the table, what is the difference between the mean numbers of turkey vultures and great blue herons observed at Hornsby Bend between March 10 and March 14?
A. 70
B. 56
C. 9
D. 441

Answer 1

Your answer would be B. 56  (Mean  is found by adding all the observations and then dividing by the total number of observations)

Answer 2

Answer: B.56

Explanation:

We know that to calculate the mean we need to add up all the observations, then divide by the number of observations .

The mean numbers of turkey vultures between March 10 and March 14 is given by :-

$\text{Mean}=\frac{\text{Sum}}{\text{number of observations}}\\\\=\frac{65+60+64+62+64}{5}=\frac{315}{5}\\\\\Rightarrow\ \text{Mean}=63$

The mean numbers of great blue herons  between March 10 and March 14 is given by :-

$\text{Mean}=\frac{\text{Sum}}{\text{number of observations}}\\\\=\frac{8+6+7+8+8}{5}=\frac{37}{5}\\\\\Rightarrow\ \text{Mean}=7.4\approx7$

The difference between the mean numbers of turkey vultures and great blue herons observed at Hornsby Bend between March 10 and March 14=$63-7=56$.