2.5: 百分比频率分布

Percentage Frequency Distribution
JoVE Core
Statistics
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JoVE Core Statistics
Percentage Frequency Distribution

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00:57 min
April 30, 2023

Overview

A percentage frequency distribution, in general, is a display of data that indicates the percentage of observations for each data point or grouping of data points. It is a commonly used method for expressing the relative frequency of survey responses and other data. The percentage frequency distributions are often displayed as bar graphs, pie charts, or tables.

The process of making a percentage frequency distribution involves the following few steps: note the total number of observations; count the total number of observations within each data point or grouping of data points; and finally, divide the total observations within each data point or grouping of data points by the total number of observations. However, it is to be noted that whenever the percentage frequencies are used in the relative frequency distribution, it is also sometimes termed as percentage frequency distribution.

Transcript

考虑不同身高的曲棍球运动员的相对频率分布表。此表提供有关每个类下数据值的分数或比例的信息。

如果此相对频率以百分比表示,则称为百分比频率分布。

假设人们对身高在 152 到 157 厘米之间的玩家的百分比感兴趣。要找出答案,请将相应的相对频率与 100 相乘,得到百分比频率。这表明 5% 的玩家落在要求的身高范围内。

对所有其他相对频率重复类似的计算,以获得每个类下的百分比频率。通常,所有百分比频率之和等于 100。

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