Measures of Center and Variability Review

Front

What is the mode of a set of numbers?

Back

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

Front

Find the mode: 4, 5, 4, 3, 5, 1, 6

Back

4 & 5

Front

What is the mean of a set of numbers?

Back

The mean is the average of a set of numbers, calculated by adding all the numbers together and dividing by the count of numbers.

Front

What is the mean of these numbers: 4, 5, 5, 2, 3, 3, 2, 8?

Back

4

Front

What is the median of a set of numbers?

Back

The median is the middle number in a sorted list of numbers. If there is an even number of observations, the median is the average of the two middle numbers.

Front

What is the median of the following numbers: 60, 62, 58, 66?

Back

62

Front

What is the range of a set of numbers?

Back

The range is the difference between the highest and lowest values in a data set.

Front

Calculate the range of the following numbers: 3, 7, 2, 9, 5.

Back

7 (9 - 2 = 7)

Front

What is the Mean Absolute Deviation (MAD)?

Back

MAD is the average of the absolute differences between each data point and the mean of the data set.

Front

Calculate the Mean Absolute Deviation for: 7, 9, 2, 7, 3, 5, 10.

Back

2.41