Question

An equation was used to predict possible weights of puppies at 6 months of age. the actual weights of the puppies are also listed.

Actual Weights (Ounces) - 9, 15, 16, 20, 20, 26
Predicted Weights (Ounces)- 9, 12, 15, 18, 21, 24
The sum of the residuals ____

Answer 1

Answer: 7

Explanation:

The formula to find the residual is given by:-

`\text{Residual=Actual-Predicted}`

Let the actual weights be
`y_i` and the predicted weight be
`x_i` , then

The sum of the residual=
`(y_1-x_1)+(y_2-x_2)+(y_3-x_3)+(y_4-x_4)+(y_5-x_5)+(y_6-x_6)`

`=(9-9)+(15-12)+(16-15)+(20-18)+(20-21)+(26-24)\\=0+3+1+2-1+2\\=7`

Hence, the sum of the residuals is 7.

Answer 2

The answer is 7

Explanation:

To start off, we make subtract the actual weight to the predicted weight. 9-9 ; 15-12 ; 16-15 ; 20-18 ; 20-21 ; 26-24 . After subtracting each column above we get 0,3,1,2,-1,2. We have to now add so that would leave us a 7.

Hope this helps, I know this is right I took the test! Have a nice day!