Mean, median, mode, range

Hello, and welcome to Myriora Maths! Five children scored three, seven, four, seven and nine in a game. What's a typical score? There are three different kinds of average. Let's meet them, and the range too.

The mean shares everything out equally. Add up all the scores: three, seven, four, seven and nine make thirty. Five children share thirty: six each. The mean is six.

The median is the middle. Put the scores in order: three, four, seven, seven, nine. The middle one is seven. So the median is seven.

The mode is the most common. Seven appears twice, more than any other score. So the mode is seven.

The range tells you how spread out the scores are. Biggest take away smallest: nine take away three is six.

Let's try one together. What is the mode of two, five, five and eight? Say it out loud!

Five appears twice. So the mode is five!

Here's a question that catches lots of people. What is the median of nine, two and five? Some people pick the middle one as it's written, and say two. But you must put them in order first: two, five, nine. The median is five.

Your turn! What is the mean of four, six and eleven? Pick the right card. You've got twenty seconds, or pause the video. Go!

Time's up! Four add six add eleven is twenty-one. Shared between three numbers: seven!

Quick review. The mean: add them up, and share equally. The median: put them in order, and find the middle. The mode: the most common one. And the range: biggest take away smallest. See you next time!