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 is an outlier in a scatter plot?

Back

An outlier is a point that is far outside the main cluster of points/ordered pairs in a scatter plot.

Front

What does a positive correlation indicate in a scatter plot?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative correlation indicate in a scatter plot?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What does 'no association' mean in the context of scatter plots?

Back

'No association' means that there is no discernible relationship between the two variables being plotted.

Front

How can you identify a linear relationship in a scatter plot?

Back

A linear relationship can be identified if the points in the scatter plot form a straight line or a pattern that closely resembles a straight line.

Front

What is the purpose of a trend line in a scatter plot?

Back

A trend line is used to summarize the relationship between the variables and to predict future values.

Front

What does the slope of a line in a scatter plot represent?

Back

The slope of a line represents the rate of change between the two variables.

Front

What is the y-intercept in the context of a scatter plot?

Back

The y-intercept is the value of y when x is zero, indicating where the line crosses the y-axis.

Front

How do you determine the best-fit line for a scatter plot?

Back

The best-fit line is determined by minimizing the distance between the line and all the data points, often using the least squares method.