Statistics 简明教程

Statistics - Frequency Distribution

频率分布是一个表,显示样本中各种结果的频率。表中的每一项包含特定组或区间内值出现的频率或计数,并且通过这种方式,表总结了样本中值的分布。

Frequency distribution is a table that displays the frequency of various outcomes in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and in this way, the table summarizes the distribution of values in the sample.

Example

Problem Statement:

Problem Statement:

在 Maple 大道上进行了一项调查,以构建频率分布表。在 20 户家庭中,人们被问及有多少辆车登记在他们的家庭名下。结果记录如下:

Constructing a frequency distribution table of a survey was taken on Maple Avenue. In each of 20 homes, people were asked how many cars were registered to their households. The results were recorded as follows:

1

2

1

0

3

4

0

1

1

1

2

2

3

2

3

2

1

4

0

0

Solution:

Solution:

为将此数据显示在频率分布表中需要遵循的步骤。

Steps to be followed for present this data in a frequency distribution table.

为此练习的频率分布表应如下所示:

Your frequency distribution table for this exercise should look like this:

Frequency table for the number of cars registered in each household

Number of cars (x)

Tally

Frequency (f)

0

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4

1

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6

2

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5

3

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3

4

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3

通过快速查看此频率分布表,我们可以看到在接受调查的 20 户家庭中,有 4 户没有汽车,有 6 户有一辆汽车。

By looking at this frequency distribution table quickly, we can see that out of 20 households surveyed, 4 households had no cars, 6 households had 1 car.