Answer to Question #101696 in Algebra for nick

Question

Which of the following is false?




a child’s age and a child’s shoe size is a positive correlation



the graduation rate in a city and the rate of unemployment in a city is a positive correlation



none, since all of the other answer choices are true



the cost to mail an envelope and the weight of the envelope is a positive correlation

Answer 1

a child's age and a child's shoe size is a positive correlation

The bigger the child the bigger his foot and therefore his shoe size,

Both variables increase together, so that is a positive correlation.

the cost to mail an envelope and the weight of the envelope is a

positive correlation.

The heavier the package, the costlier it is to mail it.

Both variables increase together, so that is a positive correlation.

none, since all of the other answer choices are true

We must check out the last one to see whether this one is true or

false.

the graduation rate in a city and the rate of unemployment in a city

is a positive correlation

Certainly this is not a positive correlation, for when more people graduate,

unemployment certainly doesn't rise. Employment may rise but certainly not

unemployment. So that one is false.