Mean, Median, and Mode

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 number of values in the set.

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 values, 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

How do you find the mean of the numbers 4, 3, 15, 11, 3, 8, 7, 5?

Back

Add all the numbers (4 + 3 + 15 + 11 + 3 + 8 + 7 + 5 = 56) and divide by the number of values (8). Mean = 56 / 8 = 7.

Front

How do you find the median of the numbers 4, 3, 15, 11, 3, 8, 7, 5?

Back

First, sort the numbers: 3, 3, 4, 5, 7, 8, 11, 15. Since there are 8 numbers (even), the median is the average of the 4th and 5th numbers: (5 + 7) / 2 = 6.

Front

How do you find the mode of the numbers 4, 3, 15, 11, 3, 8, 7, 5?

Back

The mode is 3, as it appears most frequently (twice) in the data set.

Front

What is the difference between mean and median?

Back

The mean is the average of all numbers, while the median is the middle value when the numbers are sorted.

Front

What happens if there are no repeating numbers in a data set?

Back

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

Front

Can a data set have more than one mode?

Back

Yes, a data set can be bimodal (two modes) or multimodal (more than two modes) if multiple numbers appear with the same highest frequency.

Front

What is the range of a data set?

Back

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