Random extraction device for probability demonstration in university mathematics

Abstract

The invention relates to the technical field of mathematics, and discloses a random drawing device for probability demonstration in university mathematics, which comprises a shell, the interior of the shell is fixedly connected with a storage chamber, the interior of the shell is rotatably connected with a cover plate, the interior of the cover plate is movably connected with a torsion spring, and the interior of the shell is slidably connected with a clamping block. A linkage column is slidably connected to the outside of the shell, a nut is in threaded connection to the bottom of the shell, a screw is in threaded connection to the outside of the nut, and a supporting pad is fixedly connected to the bottom of the nut; through mutual cooperative use of the shell, the storage chamber, the cover plate, the torsion spring, the clamping block, the linkage column, the nut, the screw, the supporting pad, a horizontal ruler, an extraction box, a micro motor, a driving gear, an extraction plate, a driven gear, a stirring assembly, a button, a ball outlet, a micro fan, a blocking assembly and a temporary storage box, a teacher does not need to carry out teaching demonstration; therefore, the effect of automatically completing repeated sampling or non-repeated sampling can be achieved.

Description

technical field [0001] The invention relates to the technical field of mathematics, in particular to a random extraction device used for probability demonstration in university mathematics. Background technique [0002] Mathematics is a subject that studies concepts such as quantity, structure, change, space, and information. It is a general method for human beings to strictly describe the abstract structure and mode of things. It can be applied to any problem in the real world and all mathematical objects. Essentially they are man-made. [0003] Probability theory is a branch of mathematics that studies the quantitative laws of random phenomena. There is such a subject as probability theory in universities. Because the concept of probability statistics is abstract and difficult to understand, it is often difficult for teachers to clearly describe it to students in the teaching process. Teaching is very difficult. In order to lay a solid foundation for students and allow st...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a random sampling device for probability demonstration in university mathematics, which has the advantages of automatically completing repeated sampling or non-repetitive sampling, and solves the problem of abstraction of probability and statistics, which is difficult to understand and difficult for teachers to teach. In the process, it is often difficult to clearly describe the cognition to students with language, and teaching is very difficult. In order to lay a solid foundation for students and allow students to intuitively contact the concept of probability statistics, teachers need to demonstrate probability statistics. The demonstration methods used are simple tossing even coins, throwing regular hexahedron dice, etc. Teachers do not have special experimental equipment for on-site demonstrations during teaching, which makes students lack actual observations during observation and learning, making students' learning efficiency not high. Teachers want to To complete simple repeated sampling and non-repetitive sampling, it is necessary to artificially randomly select demonstrations and artificially collect demonstration balls and reset them, which wastes time and inefficiencies

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