Heres a scatterplot of the of income spent on food versus H

Here\'s a scatterplot of the % of income spent on food versus Household income for respondents to the Cornell National Social Survey:

For each of the regression assumptions, state whether it is satisfied, not satisfied, or can\'t be determined from this plot

A)Linearity

B) Independence

C)Equal Spread

D) Normal population

Solution

A) The plot does not suggest a perfect linearity in the data. It somewhat appears to be a exponential curve.

B) No, the assumption of independence is not satisfied as the income of the household increases, % spent on food decreases. Hence, there is a realtionship between the income of the household and the % spent on food.

C) The data in not equal spread, it is exponentially distributed.

D) The data is not Normally distributed as the curve is not Bell-shaped.