Trend Lines and M.A.D.

Front

What is a trend line?

Back

A trend line is a straight line that best represents the data on a scatter plot, showing the general direction of the data points.

Front

What does a positive association in a scatter plot indicate?

Back

A positive association indicates that as one variable increases, the other variable also tends to increase.

Front

What does a negative association in a scatter plot indicate?

Back

A negative association indicates that as one variable increases, the other variable tends to decrease.

Front

What does 'no association' mean in the context of scatter plots?

Back

No association means there is no discernible relationship between the two variables being plotted.

Front

How do you identify a linear relationship in a scatter plot?

Back

A linear relationship is identified when the data points form a pattern that can be approximated by a straight line.

Front

What is Mean Absolute Deviation (M.A.D.)?

Back

Mean Absolute Deviation (M.A.D.) is a measure of the average distance between each data point and the mean of the data set.

Front

How do you calculate the Mean Absolute Deviation?

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 these absolute values.

Front

What is the formula for calculating the mean of a data set?

Back

Mean = (Sum of all data points) / (Number of data points).

Front

What does a nonlinear scatter plot indicate?

Back

A nonlinear scatter plot indicates that the relationship between the variables cannot be accurately represented by a straight line.

Front

How can you estimate values using a trend line?

Back

You can estimate values by extending the trend line beyond the known data points and finding where it intersects the desired value.