Question

Introducing Bivariate Correlations 1. At minimum, how many variables are there in an association claim? 2. What characteristic of a study makes it correlational? 3. Sketch three scatterplots: one showing a positive correlation, one showing a negative correlation, and one showing a zero correlation. 4. Sketch two bar graphs: one that shows a correlation between the two variables, and one that shows no correlation. 5. When do researchers typically use a bar graph, as opposed to a scatterplot, to display correlational data?

Answer 1

1.

Two

2.

Both the variables are measured So the different measurements of the variables.

3.

Positive correlation- So if one variable increases, So the other variable also increases.

Negative correlation- So if one variable increases, So the other variable decreases.

Zero correlation- No relationship between variables.

4.

A bar graph that shows correlation have bars at different heights
A bar graph that have zero correlation show two bars of same height.

5.

Categorical variables means one variable is categorical in nature and other one is quantitative(numbers).