Topic 9 - Bivariate Data Vocabulary

Bivariate data is

• two quantitative variables in a population

• a constant rate of change

• two variables with linear association

• a trend line

A scatter-plot

• is a graph that shows a relationship between three (3) variables

• is a graph displaying possible trends (relationships) between data points

• is a table that has multiple values showing relationships

• is the number of times a given event occurs

A _______ shows the frequencies of data that is categorized two ways.

• Two-way table.

• Box plot.

• Pictograph.

• Line graph

Which is the term that means a line that comes closest to all of the points in a scatter plot?

• Positive Correlation Line

• Negative Correlation Line

• Graph Line

• Trend Line

A dependent variable is

• output data; plotted on the y-axis

• a variable with a strong linear relationship

• input data; plotted on the x-axis

• a set of data that lie on a line

An independent variable is

• output data; plotted on the y-axis

• an estimate for a line of best fit

• input data; plotted on the x-axis

• a graph displaying possible trends between data points

Positive correlation is when

• when your data is good

• when the data has a constant rate of change

• increasing trend in data set

• decreasing in the data set

Negative correlation is when

• you have two variables modeled on a line

• Has nothing to do with scatter plots

• increasing in the data set; trend pattern increases right to left.

• decreasing in the data set; trend pattern decreases from left to right

Zero (no) correlation is when

• there are no points on the graph

• decreasing in the data set; trend pattern decreases from left to right

• no pattern or trend in the data set

• comparing three or more pieces of data

An outlier is

• an estimate for a trend line

• is a point in the middle of the majority of data points

• a point that lies outside the general trend of the majority of points

• a sample population