Scatterplots and Correlation Practice

Front

What is a scatterplot?

Back

A scatterplot is a type of data visualization that displays the relationship between two numerical variables.

Front

How are scatterplots used to represent data?

Back

Scatterplots are used to visually represent the relationship between two variables by plotting individual data points on a graph.

Front

What effect do outliers have on scatterplots?

Back

Outliers can distort the overall pattern and trend in the data, leading to inaccurate estimates and summary statistics.

Front

What does a correlation coefficient close to zero indicate?

Back

A correlation coefficient close to zero indicates a weak or no linear relationship between the two variables.

Front

What does a correlation coefficient close to 1 indicate?

Back

A correlation coefficient close to 1 indicates a strong positive linear relationship between the two variables.

Front

What does a correlation coefficient close to -1 indicate?

Back

A correlation coefficient close to -1 indicates a strong negative linear relationship between the two variables.

Front

What is the range of possible values for a correlation coefficient?

Back

The range of possible values for a correlation coefficient is from -1 to 1.

Front

What does it mean if two variables have a positive correlation?

Back

If two variables have a positive correlation, as one variable increases, the other variable also tends to increase.

Front

What does it mean if two variables have a negative correlation?

Back

If two variables have a negative correlation, as one variable increases, the other variable tends to decrease.

Front

What is the purpose of using scatterplots in data analysis?

Back

The purpose of using scatterplots in data analysis is to visually assess the relationship and correlation between two quantitative variables.