Mean, Median, Mode, and 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 calculate the mean of the numbers 2, 9, 10, 6, 8?

Back

Add the numbers: 2 + 9 + 10 + 6 + 8 = 35. Then divide by the count of numbers (5): 35 ÷ 5 = 7.

Front

What is the median?

Back

The median is the middle value in a data set when the numbers are arranged in order. If there is an even number of values, the median is the average of the two middle numbers.

Front

How do you find the median of the numbers 9, 12, 12?

Back

Arrange the numbers in order (already arranged). The median is the middle value, which is 12.

Front

What is the mode?

Back

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

Front

What is the mode of the numbers 4, 1, 2, 2, 3?

Back

The mode is 2, as it appears most frequently.

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 range of the heights 158cm, 172cm, 164cm, 164cm, 167cm, 159cm?

Back

The highest value is 172cm and the lowest is 158cm. Range = 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 an even number of values, how do you find the median?

Back

Order the data, add the two middle values, and divide by 2.