Scatterplots

Front

What is a scatterplot?

Back

A scatterplot 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 scatterplot 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 scatterplot indicate?

Back

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

Front

What does no correlation mean in a scatterplot?

Back

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

Front

What is a line of best fit?

Back

A line of best fit is a straight line that best represents the data on a scatterplot, showing the general direction of the data points.

Front

How can you estimate values using a line of best fit?

Back

You can estimate values by finding the corresponding y-value on the line of best fit for a given x-value.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess relationships between variables, identify trends, and detect outliers.

Front

What is an outlier in a scatterplot?

Back

An outlier is a data point that significantly differs from other observations in the dataset, potentially indicating an anomaly.

Front

How do you interpret the slope of the line of best fit?

Back

The slope indicates the rate of change between the two variables; a steeper slope means a stronger relationship.

Front

What is the x-axis in a scatterplot?

Back

The x-axis is the horizontal axis that typically represents the independent variable.