Understanding Center and Variability

Front

What is the Interquartile Range (IQR)?

Back

The Interquartile Range (IQR) is a measure of variability that describes the spread of the middle 50% of a data set.

Front

Which measure of central tendency is the average of a data set?

Back

Mean.

Front

What does a small Mean Absolute Deviation (MAD) indicate about a data set?

Back

It indicates that the data values are close to the mean.

Front

How do you find the mean of a data set?

Back

Add all the values together and divide by the number of values.

Front

What is the purpose of using Mean Absolute Deviation?

Back

To determine how consistent the data values are in a data set.

Front

What does a larger range in a data set indicate?

Back

It indicates that the data values are more spread out.

Front

What is a Dot Plot?

Back

A Dot Plot is a simple way to display data using dots to represent values.

Front

How can you tell which Dot Plot has more variation?

Back

By observing the spread of the dots; more spread indicates more variation.

Front

What is the Median?

Back

The Median is the middle value of a data set when it is ordered from least to greatest.

Front

What is the mode of a data set?

Back

The mode is the value that appears most frequently in a data set.