Mathematical statistical distribution demonstration system

Abstract

The invention belongs to the technical field of teaching instruments, in particular to a mathematical statistical distribution demonstration system, which comprises a shell, wherein the inner part ofthe shell is provided with a support frame, the outer sides of a slide block and fixing block are connected with a sliding groove, and the bottom end of the lower shell of a first ball groove is fixedly connected with a reaction column, and the inner part of the reaction column is provided with a second ball groove, the bottom end of the lower shell of the reaction column is fixedly connected witha base, and the inner part of the base is rotatably connected with a ball box, the original structure is improved, through the slide block and the sliding groove, the height of the support frame is adjusted, the ball is placed at different heights, the motion tracks of the ball falling at different heights are recorded, which is interesting, the shell is made of a clear plastic material, so the number of balls can be directly observed. A manual switch structure is arranged, the number and speed of the ball falling can be controlled, single ball falling demonstration can be carried out, the ball box passes through the telescopic structure, the ball in a second ball groove is taken out and placed into the ball box, the system is simple and convenient, the space is saved.

Description

technical field [0001] The invention belongs to the technical field of teaching instruments, and in particular relates to a mathematical statistics distribution demonstration system. Background technique [0002] Mathematical statistics is based on probability theory, conducts a large number of observations or experiments on uncertain phenomena affected by random factors, obtains samples and extracts information in an effective way, and then makes inferences about the statistical laws of random phenomena, which has randomness , quantitative, overall and other characteristics, and gradually formed many branches such as parameter estimation, hypothesis testing, multivariate statistics, large sample statistics, non-parametric statistics, statistical decision-making, experimental design, linear models, quality control, robust statistics, etc., and social Compared with economic statistics, it requires more strict assumptions and rigorous mathematical logic reasoning. The amount o...

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Problems solved by technology

[0003] According to the Chinese patent whose authorized announcement number is CN 207587233 U, a special teaching aid for mathematics and statistics uses the difference in the number of table tennis balls falling into each collection room to demonstrate the principle of dynamic distribution well, but there are still certain problems in the process of use. The problem is that its structure is complex and inconvenient to use. The height of the support frame cannot be adjusted according to different demonstration requirements during use. It can only demonstrate a single statistical content, which lacks interest and affects students' interest in learning, and the content of the demonstration is not intuitive and specific enough. , which affects the teaching effect; the original mathematical statistics distribution demonstration system cannot reasonably control the number of rolling balls rolling into the ball groove during use, often accompanied by the occurrence of multiple rolling balls falling at the same time, and after use Afterwards, the collection of rolling balls is inconvenient and takes up space

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