Measures of Central Tendency

Front

What is the Mean?

Back

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

Front

What is the Median?

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 Mode?

Back

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

Front

What is the Range?

Back

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

Front

How do you calculate the Mean?

Back

To calculate the Mean, add all the numbers in the data set and divide by the number of items in the set.

Front

What is an example of finding the Mean?

Back

For the data set {2, 4, 6, 8}, the Mean is (2+4+6+8)/4 = 5.

Front

How do you find the Median in an odd set of numbers?

Back

To find the Median in an odd set, arrange the numbers in order and select the middle number.

Front

How do you find the Median in an even set of numbers?

Back

To find the Median in an even set, arrange the numbers in order and average the two middle numbers.

Front

What is an example of finding the Mode?

Back

In the data set {1, 2, 2, 3, 4}, the Mode is 2 because it appears most frequently.

Front

What does it mean if there is no Mode?

Back

If no number repeats in a data set, it is said to have no Mode.