Extra Credit M.A.D. and Scatterplots

Front

What is the correlation between length of running start and distance of jump?

Back

Positive: the further you run, the further you jump.

Front

What does M.A.D. stand for in statistics?

Back

Mean Absolute Deviation.

Front

How do you calculate the Mean Absolute Deviation (M.A.D.)?

Back

1. Find the mean of the data set. 2. Subtract the mean from each data point and take the absolute value. 3. Find the average of those absolute values.

Front

What is a scatterplot?

Back

A scatterplot is a graph that shows the relationship between two quantitative variables.

Front

What does a positive correlation in a scatterplot indicate?

Back

As one variable increases, the other variable also increases.

Front

What does a negative correlation in a scatterplot indicate?

Back

As one variable increases, the other variable decreases.

Front

What is the purpose of using scatterplots in data analysis?

Back

To visually assess the relationship between two variables.

Front

If a scatterplot shows a straight line going upwards, what type of correlation is it?

Back

Positive correlation.

Front

If a scatterplot shows a straight line going downwards, what type of correlation is it?

Back

Negative correlation.

Front

What is the formula for calculating the Mean Absolute Deviation (M.A.D.)?

Back

M.A.D. = (Σ|x - mean|) / n, where x is each data point and n is the number of data points.