Chapter 7, Problem 23E

(a)

To determine

To explain the mistakes in the statement.

Explanation of Solution

The statement given in the question is as: My very low correlation of $-0.772$ shows that there is almost no association between GDP and infant mortality rate.

Form this statement we get that, assuming the relationship is linear, a correlation of $-0.772$ shows a strong relation in a negative direction. But in the statement it is written that there is no association between them.

(b)

To determine

To explain the mistakes in the statement.

Explanation of Solution

The statement given in the question is as: There was a correlation of $0.44$ between GDP and continent.

Form this statement we get that, the continent is a categorical variable and thus, the correlation does not apply between the qualitative data. But in this statement it has been shown about the correlation between the continent and GDP, which is wrong.