MAD and Reading Line Plots

The average distance between the data values and the mean.

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

MAD = (Σ |x_i - mean|) / N, where x_i is each data point, mean is the average, and N is the number of data points.

2

It indicates that the data values are more spread out from the mean.

The median is the middle value when data is ordered, while the mean is the average of all data values.

1. Order the data from least to greatest. 2. If there is an odd number of values, the median is the middle one. If even, it is the average of the two middle values.

A line plot is a graph that shows frequency of data along a number line.

You can see how many times each value occurs in the data set.

To measure the variability or spread of a data set.