Measures of Center & Variation

How the lesson starts: Measures of Center & Variation

Mini golf on the Moon!
Hi! Captain Zara's space crew is playing mini golf on the Moon. Each score is the number of strokes on a hole. What's a typical score? Today you'll learn three ways to find the center: the mean, the median and the mode. Fore!
The mean: a fair share
Zara's scores on four holes: 4, 6, 8 and 10. The mean is the fair-share value. Add them up: 28. Divide by 4 holes: 7. Why divide? If you leveled out all the strokes evenly, every hole would get 7. See the dashed line at 7?
Median and mode
Rover Rex scored 3, 3, 5, 6 and 9, already in order. The median is the middle value. Five scores, so the 3rd one: 5. The mode is the value that shows up most often. 3 appears twice, so the mode is 3. They don't have to match!