Discrete random variable distribution function demonstration and image drawing instrument

Abstract

The invention discloses a discrete random variable distribution function demonstration and image drawing instrument. The invention aims to provide a discrete random variable distribution function demonstration and image drawing instrument which can quickly display a distribution rule that a discrete random variable takes any data through the level heights in a plurality of liquid measuring cups, can accumulate liquid in all the measuring cups together in sequence to show that the distribution function is the ordered accumulation of probability and the right continuity and can draw an image ofthe distribution function and the like. The discrete random variable distribution function demonstration and image drawing instrument comprises a support frame, a transverse plate slide rail, a sliding block baffle, a drawing board, a probability display, a function accumulator, a piston paintbrush, a connecting guide pipe, a control rod and a counterweight box. The demonstration instrument has the benefits that the operation is simple, all demonstrations and graphics can be completed only by pushing the control rod, and the applicability is strong; the discrete random variable distribution function demonstration and image drawing instrument can be used for calculation, demonstration and drawing in any perspective on various occasions and is suitable for teacher teaching, student learningand popular science.

Description

technical field [0001] The invention relates to a teaching model, in particular to a discrete random variable distribution function demonstration and image plotter. Background technique [0002] Probability theory plays a key role in the era of big data, in which the distribution function of random variables is its core, but students' grasp of such probable problems lacks the support of practical problems and intuitive performance. In terms of understanding, they simply use commonly used real variables and In particular, it is difficult for students to form a complete and clear systematic concept when learning or training the distribution of discrete random variables, and the classroom efficiency is not high and sharing is poor. For a long time, no comprehensive application model or device has been found in this area, only some partial function devices have appeared. For example, the document with the patent application number 201620584403X provides "a teaching tool for rand...

AI Technical Summary

Problems solved by technology

The disadvantage is that the distribution column of discrete random variables cannot be demonstrated, and the image of the distribution function cannot be drawn

The document with the patent application number CN201220704817.3 provides "a normal probability distribution demonstrator", including a demonstration board, a spherical cylinder, an n-layer hexagonal prism, a ball box, etc., which can only be used to demonstrate the normal probability distribution Distribution experiments, cannot demonstrate the distribution sequence of general discrete random variables, cannot draw the graph of the distribution function

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