Mean, Median, Mode & Range

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

How do you find the mean of these numbers: 5, 11, 2, 12, 4, 2?

Back

Add the numbers: 5 + 11 + 2 + 12 + 4 + 2 = 36. Then divide by the count of numbers (6): 36 ÷ 6 = 6.

Front

What is the mode?

Back

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

Front

What does it mean if the mode of a test score is 94?

Back

It means that more students received a score of 94 than any other score.

Front

What is the median?

Back

The median is the middle number in a sorted list of numbers.

Front

How do you find the median of this set of data: 10, 90, 80, 60, 50, 40, 70, 30, 20, 100?

Back

First, sort the numbers: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100. The median is the average of the two middle numbers (50 and 60): (50 + 60) ÷ 2 = 55.

Front

What is the range?

Back

The range is the difference between the largest and smallest numbers in a data set.

Front

How do you find the range of these heights: 158cm, 172cm, 164cm, 164cm, 167cm, 159cm?

Back

Identify the largest height (172cm) and the smallest height (158cm). The range is 172cm - 158cm = 14cm.

Front

What is the formula for calculating the mean?

Back

Mean = (Sum of all values) ÷ (Number of values).

Front

If a data set has no repeating numbers, what can you say about the mode?

Back

If there are no repeating numbers, the data set has no mode.