Unit 2: 8.11B Mean Absolute Deviation

Front

True or false?: The absolute value of a number will always be positive.

Back

True

Front

Which of the following is true concerning the mean absolute deviation of a set of data? It describes the variation of the data values around the median. / It describes the average distance between each data value and the mean. / It describes the absolute value of the mean. / It describes the variation of the data values around the mode.

Back

It describes the average distance between each data value and the mean.

Front

What is another word for average?

Back

Mean

Front

Calculate the Mean Absolute Deviation of the following data: 156, 189, 134, 220, 138, 192

Back

28.8

Front

What is the first step when calculating the Mean Absolute Deviation?

Back

Find the mean of the data.

Front

What does Mean Absolute Deviation (MAD) measure?

Back

MAD measures the average distance of each data point from the mean.

Front

If the data set is {5, 7, 9}, what is the mean?

Back

The mean is 7.

Front

How do you find the absolute deviation of a data point?

Back

Subtract the mean from the data point and take the absolute value.

Front

What is the formula for Mean Absolute Deviation?

Back

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

Front

What is the mean of the data set {10, 20, 30, 40, 50}?

Back

The mean is 30.