Scatter Plots

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does a positive slope indicate in a scatter plot?

Back

A positive slope indicates that as one variable increases, the other variable also increases.

Front

What does a negative slope indicate in a scatter plot?

Back

A negative slope indicates that as one variable increases, the other variable decreases.

Front

What does it mean if a scatter plot has no association?

Back

It means there is no discernible relationship between the two variables; the data points are scattered randomly.

Front

What is an outlier in a scatter plot?

Back

An outlier is a data point that differs significantly from other observations, often lying far away from the trend of the data.

Front

How can you identify a positive slope in a scatter plot?

Back

A positive slope can be identified when the data points trend upwards from left to right.

Front

How can you identify a negative slope in a scatter plot?

Back

A negative slope can be identified when the data points trend downwards from left to right.

Front

What does a slope of 0 indicate in a scatter plot?

Back

A slope of 0 indicates that there is no change in the dependent variable as the independent variable changes; the line is horizontal.

Front

What is the formula for calculating the slope between two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated using the formula: m = (y2 - y1) / (x2 - x1).

Front

What is the significance of the slope in a scatter plot?

Back

The slope indicates the rate of change between the two variables and helps to understand the strength and direction of their relationship.