Making Predictions and Reading 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

How can you use a scatterplot to make predictions?

Back

You can use a scatterplot to identify trends and relationships between variables, allowing you to estimate values for one variable based on the value of another.

Front

What does the trend line in a scatterplot represent?

Back

The trend line represents the general direction or pattern of the data points, indicating the relationship between the two variables.

Front

If a scatterplot shows a positive correlation, what does that mean?

Back

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

Front

If a scatterplot shows a negative correlation, what does that mean?

Back

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

Front

What is the purpose of making predictions using a scatterplot?

Back

The purpose is to estimate unknown values based on observed data, helping to understand trends and make informed decisions.

Front

How do you determine the average number of hours a person works based on a scatterplot?

Back

You look for the corresponding data point on the scatterplot that matches the average hours spent on recreational activities and read the associated work hours.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can indicate anomalies or errors in data collection.

Front

How can you interpret the slope of a trend line in a scatterplot?

Back

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

Front

What does it mean if a scatterplot has no correlation?

Back

No correlation means there is no discernible relationship between the two variables; the data points are scattered randomly.