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Probability and Statistics
The probability of something is the chance that it will happen. This is often expressed as a percentage. For example, if you flip a coin, the probability of it being heads is fifty percent. If you roll a die（骰子）, the probability of it being the number one is 16.67% or 1/6. You can determine the probability by taking the number of ways something can happen and dividing it the total number of outcomes.
Statistics, on the other hand, is the filed of math that collects, organizes, and interprets data. Once data has been collected, one of the easiest ways to analyse it is with graphs. For data that involves probability, circle graphs or pie charts—are the best to use. These can be divided into 100 percentage points. Perhaps there is a fifty percent chance of something happening, a twenty-five percent chance of something else happening, and a twenty-five percent chance of something different happening. This can easily be shown on a circle graph.
On the other hand, other statistic are best recorded on a bar graph. These are simple charts with an x-axis and y-axis. For example, perhaps the person is recording some students' best subject. The classes are English, math ,science, and history. These classes go on the x-axis, which is horizontal. The number of students that do well in each class goes on the y-axis, which is vertical. This makes the data easy to see and to interpret.
Fill in the blanks.
- A _____________________ is also called a pie chart.
- The chance of something happening is its ___________________.
- Statistics is the field of math that collects, organizes, and _____________.
生词表
expressed 表达//快递
percentage 百分比
determine 查明/确定
interpret 解释
graph 图表
divide 分
horizontal 水平的
vertical 垂直的
