Scatter Plots and Outliers
Scatter plots and outliers is a Grade 7 statistics concept in Big Ideas Math Advanced 2, Chapter 9: Data Analysis and Displays. A scatter plot shows the relationship between two variables by plotting data points on a coordinate plane, and outliers are data points that fall far from the general pattern of the other points. For example, a student who studied 10 hours but scored only 45% is an outlier in a scatter plot of study time versus test scores.
Key Concepts
A scatter plot is a graph that displays data points to show the relationship between two variables. Data points that lie far from the general pattern or trend of the other points are called outliers .
Common Questions
What is a scatter plot?
A scatter plot is a graph that displays pairs of values for two variables as points on a coordinate plane, allowing you to see patterns, trends, and relationships between the variables.
What is an outlier in a scatter plot?
An outlier is a data point that lies far from the general pattern or trend formed by the other points. It stands out as unusual compared to the overall data.
How do outliers affect a scatter plot analysis?
Outliers can affect the line of fit and may skew analysis if included. Identifying outliers is important because they may represent measurement errors, unusual cases, or genuinely interesting exceptions.
What textbook covers scatter plots and outliers in Grade 7?
Big Ideas Math Advanced 2, Chapter 9: Data Analysis and Displays covers scatter plots and how to identify and interpret outliers.