Play and Learn · Math Learning Center · Level 10

Statistics

統計

Statistics helps us understand data. In this lesson you will learn about the mean, median, mode and range, and how to show data with charts.

統計幫助我們理解數據。在這一課,你會學習平均數、中位數、眾數和範圍,以及怎樣用圖表展示數據。

1 · Mean, median and mode

平均數、中位數和眾數

These are three ways to find the "average":

這是三種找出「平均」的方法:

  • Mean — total divided by how many.平均數——總和除以數量。
  • Median — the middle number when sorted.中位數——排序後中間的數。
  • Mode — the most common number.眾數——出現最多的數。
🔑 Key idea

For 2, 4, 6: mean = 4, median = 4, mode = none (all appear once).

對於 2、4、6:平均數 = 4,中位數 = 4,沒有眾數(每個只出現一次)。

2 · Range

範圍

The range shows how spread out the data is. It is the biggest value minus the smallest value. A big range means the data is spread out.

範圍顯示數據分散的程度。它是最大值減去最小值。範圍大代表數據分散。

3 · Charts

圖表

A B C
A bar chart compares amounts.
棒形圖用棒來比較數量。

We show data with charts. A bar chart uses bars to compare amounts. A pie chart is a circle divided into slices to show parts of a whole.

我們用圖表來展示數據。棒形圖用棒來比較數量。圓形圖是一個分成多塊的圓,用來顯示整體的各部分。

4 · Quick check

小測驗

Q1. What is the mean of 2, 4, 6?

2、4、6 的平均數是多少?

Q2. What is the middle number called?

中間的數叫甚麼?

Q3. What is the most common number called?

出現最多的數叫甚麼?

Q4. What is the range of 3, 7, 10?

3、7、10 的範圍是多少?

Q5. What chart uses bars?

哪種圖表用棒?

Q6. What is the mean of 5, 5, 5?

5、5、5 的平均數是多少?
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