Mean Absolute Deviation, Trend Lines and Association Practice

Front

What is Mean Absolute Deviation (MAD)?

Back

MAD 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 those absolute values.

Front

Find the MAD for the data set: 1, 4, 8, 9, 10, 11, 15.

Back

3.4

Front

What does a nonlinear scatterplot indicate?

Back

A nonlinear scatterplot indicates that the relationship between the variables is not a straight line.

Front

What is another term for average in statistics?

Back

Mean.

Front

Find the MAD for the data set: 58, 38, 54, 48, 26, 36.

Back

10

Front

What type of association does a graph with a positive slope have?

Back

Positive association.

Front

What is a trend line?

Back

A trend line is a line that best represents the data on a scatterplot, showing the general direction of the data.

Front

What does a positive association in a scatterplot mean?

Back

As one variable increases, the other variable also tends to increase.

Front

What is the difference between mean, median, and mode?

Back

Mean is the average, median is the middle value, and mode is the most frequently occurring value in a data set.