Question

what kind of data is best visualized using scatter plots?
a. nominal data
b. categorical data
c. bivariate data
d. single variable data
how can the strength of an association in a scatter plot be described?
a. by the closeness of the points to a line
b. by the number of points
c. by the size of the points
d. by the color of the points

Explanation:

• First question: Scatter plots are used to display bivariate data (two - variable data) as they show the relationship between two numerical variables. Nominal data is unordered categorical data (e.g., names of colors), categorical data is grouped data (e.g., types of animals), and single - variable data is for one variable (e.g., just heights of people).
• Second question: The strength of an association in a scatter plot is determined by how closely the points follow a line. The number of points affects the reliability of the association but not the strength. The size and color of the points are just for visual representation and do not relate to the strength of the association.

Answer:

1. c. Bivariate data
2. a. By the closeness of the points to a line