1

Five children aged 2, 3, 5, 7 and 8 years old weigh 14, 20, 32, 42 and 44 kilograms respectively.

1 Find the equation of the regression line of age on weight.

2 Based on this data, what is the approximate weight of a six year old child?

xi yi xi ·yi xi2 yi2
2 14 4 196 28
3 20 9 400 60
5 32 25 1,024 160
7 42 49 1,764 294
8 44 64 1,936 352
25 152 151 5,320 894

Correlation and Regression Operations

Correlation and Regression Operations

Correlation and Regression Operations

Correlation and Regression Operations

Correlation and Regression Operations

Correlation and Regression Solution