Extra Credit M.A.D. and 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 grid.

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 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 determine if there is a correlation between two variables?

Back

You can determine correlation by analyzing the scatterplot; if the points form a pattern (linear or otherwise), there is a correlation.

Front

What does it mean if there is no correlation between two variables?

Back

No correlation means that there is no predictable relationship between the two variables; changes in one do not affect the other.

Front

What is the purpose of using a scatterplot in data analysis?

Back

The purpose of using a scatterplot is to visually assess the relationship between two variables and identify trends or patterns.

Front

How do you interpret the slope of a 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 significance of outliers in a scatterplot?

Back

Outliers are data points that differ significantly from other observations; they can affect the line of best fit and overall analysis.

Front

What is the average value in a dataset?

Back

The average value, or mean, is calculated by adding all the values together and dividing by the number of values.