Mean vs Median

概要

When we have a list of numbers, we often want to find one number that best represents the whole group. The mean (average) and median (middle value) are two common ways to do this. It's like trying to find the typical score in a class or the usual amount of pocket money in a group of friends.

詳細説明

例題

• 🏠 House Prices: In a neighborhood with houses worth $200k, $210k, $220k, $225k, and $1M, the median ($220k) better represents a typical house than the mean ($371k), which is pulled up by the expensive house.
• 📱 Screen Time: If your daily phone usage is 2, 3, 3, 4, and 12 hours, the median (3 hours) better shows your typical usage than the mean (4.8 hours), which is affected by that one long day.
• 💰 Allowance Example: Five kids get weekly allowances of $5, $5, $6, $6, and $20. The mean ($8.40) is misleading, while the median ($6) better shows what most kids receive.