Classification and summary is a data analysis method used to classify data and calculate statistics such as frequency and percentage for each category. It can help researchers better understand the characteristics and distribution of data.

    Class aggregation is always a method of organizing and summarizing statistical data, mainly used to classify and summarize data, in order to better understand the distribution and characteristics of data. Classification and summary can group data based on different variables or factors and calculate the frequency, proportion, mean, or other descriptive statistics of each group. Classification and summarization can provide an overview of data, helping researchers and decision-makers better understand the characteristics and trends of data.

    Data description:

    Background description:

    These data provide information on the gender distribution of a population and are classified according to two items. Based on the data, we can see how the distribution of males and females varies under different projects. These data may come from a social survey or study aimed at understanding the gender distribution characteristics in the population and their correlation with other factors. This information is of great significance for understanding demographic characteristics, sociological research, and policy formulation.

    Here, gender is put into analysis item Y, and whether it is an only child, and the number of brothers and sisters into analysis item X. The analysis table is as follows:

    According to the data provided, we can classify and summarize the gender distribution under different items, including whether it is an only child and the number of brothers and sisters. The following are detailed textual explanations for each project:

    Whether it is an only child or not: Under the "only child" program, 13 people (50.00% of the total) are males and 27 people (50.00% of the total) are females. Under the non only child program, 13 people (50.00% of the total) are males and 27 people (50.00% of the total) are females.

    Number of brothers and sisters: under the item of no brothers and sisters, 9 (34.62% of the total) are men and 21 (38.89% of the total) are women. Under the project of having one brother and sisters, 11 (42.31% of the total) were men and 15 (27.78% of the total) were women. There are two brothers and sisters under this project, 6 (23.08% of the total) are male, and 18 (33.33% of the total) are female.

    The analysis graph is as follows:

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