Question

For each of the pairs below, determine whether they are positively correlated, negatively correlated, or uncorrelated.a. Time spent studying and test scores: Positively correlated, Negatively correlated, Uncorrelated.b. Vaccination and illness: Positively correlated, Negatively correlated, Uncorrelated.c. Soft drink preference and music preference: Positively correlated, Negatively correlated, Uncorrelated.d. Income and education: Positively correlated, Negatively correlated, Uncorrelated.

Answer 1

Answer:

A. Positively Correlated ; B. Negatively Correlated ; C. Uncorrelated

Explanation:

Correlation is the mutual / similar change direction relationship between 2 variables .

If 2 variables change in same direction (one increase - other increase , one decrease - other decrease) , they are positively correlated .

If 2 variables change in opposite direction (one increase - other decrease , one decrease - other increase) , they are negatively correlated .

A. More time spent studying implies higher test scores & less time spent studying implies lower test score . So , they are positively correlated .

B. Vaccination (being protection from illness) increase implies less illness , if decrease implies more illness . So , they are negatively correlated .

C. Soft Drink & Music seem to have no logical mutual movement connectivity . So , they are Not Correlated / Uncorrelated .