Scatter Plots and Trend Lines

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 trend line represent in a scatter plot?

Back

A trend line is a straight line that best represents the data points in a scatter plot, indicating the general direction of the data.

Front

What is correlation in statistics?

Back

Correlation measures the strength and direction of a linear relationship between two variables.

Front

What are the types of correlation?

Back

Positive correlation, negative correlation, and no correlation.

Front

What is a positive correlation?

Back

A positive correlation occurs when an increase in one variable leads to an increase in another variable.

Front

What is a negative correlation?

Back

A negative correlation occurs when an increase in one variable leads to a decrease in another variable.

Front

What does 'no correlation' mean?

Back

No correlation means there is no discernible relationship between the two variables.

Front

What is an outlier in a data set?

Back

An outlier is a data point that differs significantly from other observations in the data set.

Front

How do you identify an outlier?

Back

An outlier can be identified by looking for points that fall far away from the trend line or the general cluster of data points.

Front

What is the purpose of fitting a trend line to data?

Back

Fitting a trend line helps to summarize the data, making it easier to understand the overall trend and make predictions.