Question

2 mark for review which of the following is the best description of a positive association between two variables? a the values will create a line when graphed on a scatterplot. b the values will create a line with positive slope when graphed on a scatterplot. c as the value of one of the variables increases, the value of the other variable tends to decrease. d as the value of one of the variables increases, the value of the other variable tends to increase. e all values of both variables are positive.

Explanation:

In statistics, a positive association between two variables means that as the value of one variable increases, the value of the other variable also tends to increase. A line on a scatter - plot with positive slope is an indication of positive association but the most fundamental definition is about the tendency of co - movement of the variables. Option A just mentions creating a line which is not specific to positive association. Option B is a result of positive association but not the best description. Option C describes a negative association. Option E is about the sign of values, not the association between variables.

Answer:

D. As the value of one of the variables increases, the value of the other variable tends to increase.