Mathematical Statistics Distribution Demonstration System

Abstract

The invention belongs to the technical field of teaching instruments, in particular to a mathematical statistics distribution demonstration system, which includes a casing, a support frame is arranged inside the casing, and a chute is attached and connected to the outside of the slider and the fixed block. The bottom end of the lower shell of the first ball groove is fixedly connected with a reaction column, and a second ball groove is provided around the inside of the reaction column, and the bottom end of the lower shell of the reaction column is fixedly connected with a base, and the inside of the base There is a ball box connected by screwing, which improves the original structure, adjusts the height of the support frame through the slider and the chute, places the rolling ball at different heights, and records the trajectory of the rolling ball falling at different heights. It is very interesting and the shell It is made of transparent plastic material, which can visually observe the number of rolling balls; the set manual switch structure can control the number and speed of rolling balls falling, and perform a single rolling ball drop demonstration. The rolling ball is taken out and put into the ball box, which is simple and convenient and saves space.

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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