1、2、3、4、5的模式是什么?
在统计学中,对于给定的数据分布,众数是最常出现的值或数字。它代表出现次数最多的值或整数。但是,给定的一组数据集可能有也可能没有模态值。这是因为给定的数据集可能具有重复或非重复值。除此之外,给定的数据集可能具有一种、两种或多种模式。数据集会影响众数的值。
模式公式
Here, we have,
L – lower limit of the modal class,
h – size of the class interval,
fm – frequency of the modal class,
f1 – frequency of the class preceding the modal class, and
f2 – frequency of the class succeeding the modal class.
未分组数据的众数公式
在未分组数据的情况下,数据分布首先按升序或降序排列。然后将重复值连同它们的频率一起描述。对应于最高频率的观察被称为给定数据的模态值。
分组数据的众数公式
分组数据的众数公式由下式给出,
Here, we have,
L – lower limit of the modal class,
h – size of the class interval,
fm – frequency of the modal class,
f1 – frequency of the class preceding the modal class and
f2 – frequency of the class succeeding the modal class.
如何查找分组和未分组数据的模式
未分组数据的模式
未出现在组中的数据称为未分组数据。为了说明,我们举了一个例子,假设有一家服装公司生产冬衣。显示的频率分布表中提到了以下带有衬衫的表格数据以及尺寸:Size of the winter coat 38 39 40 42 43 44 45 Total number of shirts 33 11 22 55 44 11 22
因为很明显,42 号的频率最高。因此,冬季大衣尺码的众数为 42。
未分组数据的众数计算不同于分组数据的众数。
分组数据模式
以下步骤对应于分组数据的模式计算:
步骤 1:计算对应于最大频率的类间隔。该值也称为模态类。
第 2 步:通过从相应的下限中减去上限来计算类的大小。
步骤 3:使用众数公式计算众数的值:
1、2、3、4、5的模式是什么?
解决方案:
Step 1: The data is already arranged in ascending order. Therefore, there is no need to arrange the data in increasing order.
Step 2: Constructing the frequency table: Number 1 2 3 4 5 Frequency 1 1 1 1 1
Step 3: Since the frequency of all the numbers are same, therefore, there is no specific mode for the given set of data distribution.
Conclusively, if no numbers in the data distribution are repeated, then there is no mode for such observation.
示例问题
问题1:前n个自然数的众数是多少?
解决方案:
Since, all the numbers occur just once, therefore, there is no mode of the distribution.
问题 2:一个数据集有 10 个随机数。让我们假设 3 是这种分布的模式。数字 3 最少出现多少次是模式?
解决方案:
Since, if the frequency of occurrence of mode value is equivalent to 1, then the other 9 numbers also would somehow be occurring once. In that case, there would be no mode for the given data. Therefore, minimum of the times that number 3 should occur is 2.
问题 3:说明一个满足问题 2 的示例。
解决方案:
For instance, let us assume the data given to be
1, 2, 3, 3, 4, 5, 6, 7, 8 and 9. In this case, the number 3 occurs 2 times and has the highest frequency. Therefore, it becomes the mode of the given dataset.
问题4:为什么一个数据集的模式不能决定数据的集中趋势?
解决方案:
Since the mode value of any given data set may occur either as the first value of the increasing order data arrangement or at last. Therefore, it cannot be used as a measure to determine what the other numbers are. Also, the mode of a dataset may or may be defined based on the repetition of values.
问题5:哪里不能定义数据的模式?
解决方案:
The mode of data holds no relevance where all the values that comprise the data set occur an equal number of times. It may include the case where:
- Repetition of every number occurs the same number of times
- No repetition occurs