7.3 Describing Scatterplots Lesson Check

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 correlation in a scatter plot indicate?

Back

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

Front

What does a negative correlation in a scatter plot indicate?

Back

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

Front

What is the purpose of using a scatter plot?

Back

The purpose of using a scatter plot is to visually assess the relationship between two variables and identify patterns or trends.

Front

How can you determine if a scatter plot suggests a linear relationship?

Back

A scatter plot suggests a linear relationship if the data points roughly form a straight line.

Front

What does it mean if there is no correlation in a scatter plot?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one do not predict changes in the other.

Front

What is the significance of outliers in a scatter plot?

Back

Outliers are data points that fall far from the trend of the rest of the data; they can significantly affect the correlation and interpretation of the scatter plot.

Front

How can you estimate a value from a scatter plot?

Back

You can estimate a value by locating the corresponding point on the scatter plot and reading the value from the axis.

Front

What is the relationship between the number of absences and final exam scores in the given example?

Back

In the example, as the number of absences increases, the final exam score tends to decrease, indicating a negative correlation.

Front

What does the term 'association' refer to in the context of scatter plots?

Back

Association refers to the relationship between two variables, which can be positive, negative, or nonexistent.