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.

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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 relationship between the variables.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to predict values by locating a point on the line corresponding to a given value of one variable and finding the associated value of the other variable.

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 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 variable do not predict changes in the other.

Front

How do you determine the number of chapters in a book using a scatter plot?

Back

You can determine the number of chapters by locating the total number of pages on the x-axis and finding the corresponding value on the y-axis using the trend line.

Front

How do you determine the total number of pages in a book using a scatter plot?

Back

You can determine the total number of pages by locating the number of chapters on the y-axis and finding the corresponding value on the x-axis using the trend line.

Front

What is the purpose of using scatter plots in data analysis?

Back

Scatter plots are used to visually assess the relationship between two variables, identify trends, and make predictions based on data.

Front

What is the significance of outliers in a scatter plot?

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Outliers are data points that fall far from the trend line and can indicate anomalies or errors in data collection, or they may represent unique cases.