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 linear relationship in a scatterplot indicate?

Back

A linear relationship indicates that as one variable increases or decreases, the other variable tends to do the same in a consistent manner, forming a straight line when graphed.

Front

What type of scatterplot would you expect when graphing temperature outside (x) and the number of visitors at the beach (y)?

Back

You would expect a positive correlation scatterplot, where higher temperatures correspond to more visitors.

Front

How can you predict values using a scatterplot?

Back

You can predict values by finding the trend line or pattern in the scatterplot and using it to estimate the value of one variable based on the other.

Front

What does it mean if a scatterplot shows no correlation?

Back

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

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables, identify trends, and make predictions.

Front

What is the best prediction of the total number of pages in a book with 4 chapters based on a scatterplot?

Back

118 pages.

Front

If a scatterplot shows that as the number of hours spent playing video games increases, the number of hours spent sleeping decreases, what type of correlation is this?

Back

This is a negative correlation.

Front

What is the best prediction of the number of hours one of Phil's friends spends sleeping when the friend spends 1 hour playing video games?

Back

9 hours.

Front

How does temperature affect the speed of sound according to a scatterplot?

Back

Generally, as the temperature increases, the speed of sound also increases.