CN209859394U - Statistics variance calculation principle show board - Google Patents

Abstract

The utility model relates to a teaching appurtenance field particularly, relates to a statistics variance calculates principle show board, and this kind of statistics variance calculates principle show board includes: a substrate and a display shelf; the display rack comprises a cross rod and a scale rod, the cross rod is perpendicular to the scale rod, and the cross rod is connected with the scale rod; the scale rod is provided with a first scale indication area, scales are marked in the first scale indication area along the length direction of the scale rod, and the position corresponding to the cross rod on the first scale indication area is set to be zero scale.

Description

Statistics variance calculation principle show board

Technical Field

The utility model relates to a teaching appurtenance field particularly, relates to a statistics variance calculates principle show board.

Background

Variance is an important underlying concept in statistics. In the compulsory education stage, the concept of the variance is learned in eight or nine grades according to different teaching materials. In the existing teaching materials, the variance calculation formula represented by letters is complex and abstract for children, is not beneficial to forming vivid concepts, has certain difficulty in memorizing and is not beneficial to raising the learning interest of students.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a statistics variance calculates principle show board, it can provide vivid show of image for this understanding with the concept of variance, carries out the teaching of variance concept through the show board is supplementary for the student can remember the calculation principle of remembering the variance through the show memory of imaging rapidly in the classroom, and then obtains the computational method naturally.

The embodiment of the utility model is realized like this:

a statistical variance calculation principle display board, comprising: a substrate and a display shelf; the display rack comprises a cross rod and a scale rod, the cross rod is perpendicular to the scale rod, and the cross rod is connected with the scale rod; the scale rod is provided with a first scale indication area, scales are marked in the first scale indication area along the length direction of the scale rod, and the position corresponding to the cross rod on the first scale indication area is set to be zero scale.

In a preferred embodiment of the present invention, the base plate is detachably connected to the display stand.

In the preferred embodiment of the present invention, the base plate is provided with a first magnetic member, the display shelf is provided with a second magnetic member, and the base plate and the display shelf are detachably connected through the first magnetic member and the second magnetic member.

In the preferred embodiment of the present invention, the magnetic pen further comprises a scattering mark block, and a third magnetic member is disposed on the scattering mark block.

The utility model discloses an in the preferred embodiment, be equipped with second scale indication area on the base plate, the scale mark proportion in second scale indication area is the same with scale mark proportion in the first scale indication area.

In a preferred embodiment of the present invention, the base plate includes a plate surface and a supporting member, the plate surface is used for connecting with the display rack, the supporting member is a frame structure, and a plane formed by the supporting member is perpendicular to a plane formed by the base plate.

In a preferred embodiment of the present invention, the display rack is provided with a grip portion.

The embodiment of the utility model provides a beneficial effect is:

through the cooperation of base plate and show board, can help forming the imaging show to the theory of calculation of variance in the classroom, be favorable to improving student's interest in learning, supplementary memory.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a statistical variance calculation principle display board according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a substrate according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a display stand according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a scattering point and an average number line thereof according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a method for using a statistical variance calculation principle display board according to an embodiment of the present invention.

Icon: 1-a substrate; 11-a second scale indication zone; 12-a support; 13-plate surface; 2-a display rack; 21-scale bar; 22-a first scale indication zone; 23-a cross-bar; 24-a grip portion; 3-scattered point identification blocks; 4 a-mean line.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that the directions or positional relationships indicated in the specification are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but not for indicating or implying that the indicated devices or elements must have specific directions, be constructed and operated in specific directions, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the term "vertical" or the like does not require that the components be absolutely vertical, but may be slightly inclined.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as meaning directly connected to each other, indirectly connected through an intermediate medium, and communicating between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Please refer to fig. 1-5. The utility model provides a statistics variance calculates principle show board. The statistical variance calculation principle display board comprises a substrate 1, a display frame 2 and a scatter mark block 3.

The base plate 1 includes a plate surface 13 and a support 12. The supporting member 12 is a frame structure, and the plane of the plate surface 13 is perpendicular to the plane of the frame structure formed by the supporting member 12.

The plate surface 13 is provided with a second scale indication area 11.

The plate surface 13 is provided with a first magnetic member.

The display stand 2 includes a cross bar 23, a scale bar 21, and a grip 24. The cross bar 23 is perpendicular to the scale bar 21, and the cross bar 23 is connected to the scale bar 21.

The scale rod 21 is provided with a first scale indication area 22, in the first scale indication area 22, scales are marked along the length direction of the scale rod 21, and the position corresponding to the cross rod 23 on the first scale indication area 22 is set to be zero scale. The scale mark proportion in the first scale indication region 22 is the same as the scale mark proportion in the second scale region. Namely: the distance between the two points is the same as the reading at the first scale indication area 22 and the reading at the second scale indication area 11.

One end of the holding part 24 is connected with the scale part, and the other end of the holding part 24 is connected with the cross bar 23. A holding space for holding the display shelf 2 is formed among the holding part 24, the scale and the cross bar 23.

Be equipped with the second magnetic part on show shelf 2, the second magnetic part can adsorb each other with first magnetic part to make show shelf 2 be fixed in on the face 13 of panel.

The scattered point identification block 3 is provided with a third magnetic part. The third magnetic member can be attracted to the first magnetic member, so that the third magnetic member is fixed on the board surface 13 of the display board.

The number of the third magnetic members is plural.

The utility model provides a statistical variance calculates application method of principle show board lies in:

please refer to fig. 4 and 5. In teaching, scattered points are firstly drawn on the board surface 13 of the display board, or scattered point identification blocks are adhered on the board surface 13 of the display board, and then the reading of each scattered point under the first scale indication area 22 is read. The individual readings were averaged. In fig. 4, the broken line indicates the average of the obtained scatter points.

Then the display frame 2 is adhered to the surface 13 of the display board, and the zero scale mark on the display frame 2 is overlapped with the average number line 4a of each scattered point, namely: the cross bar 23 is made to cover the average number line 4a of the respective scatter points. Then at this point, the reading of each scatter point in the second scale indication area 11 is the difference between each scatter point and the average. The squares of the readings of the scatter points in the second scale indication area 11 are summed and divided by the number of the scatter points, so that the variance of the scatter points can be obtained.

The utility model provides a statistics variance calculates principle show board's beneficial effect lies in:

through the design of show shelf 2, can carry out the demonstration of image with the computational process and the principle of variance, in the teaching, as long as the student remembers the demonstration process, just can obtain the computational formula of variance naturally, avoided using complicated letter formula to teach the drawback that has abstract, be difficult to understand the memory simply.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A statistical variance calculation principle display board is characterized by comprising: a substrate and a display shelf;

the display rack comprises a cross rod and a scale rod, the cross rod is perpendicular to the scale rod, and the cross rod is connected with the scale rod;

the scale rod is provided with a first scale indication area, scales are marked in the first scale indication area along the length direction of the scale rod, and zero scales are arranged at positions, corresponding to the cross rod, on the first scale indication area.

2. The statistical variance calculation principle display board according to claim 1, wherein the base plate is detachably connected to the display shelf.

3. The statistical variance calculation principle display board according to claim 2, wherein a first magnetic member is arranged on the base plate, a second magnetic member is arranged on the display frame, and the base plate and the display frame are detachably connected through the first magnetic member and the second magnetic member.

4. The statistical variance calculation principle display board according to claim 3, further comprising a scattering mark block, wherein a third magnetic member is arranged on the scattering mark block.

5. The statistical variance calculation principle display board according to claim 1, wherein a second scale indication area is provided on the substrate, and the scale mark proportion of the second scale indication area is the same as the scale mark proportion of the first scale indication area.

6. The statistical variance calculation principle display board according to claim 1, wherein the base board comprises a board surface and a support member, the board surface is used for being connected with the display rack, the support member is a frame structure, and a plane formed by the support member is perpendicular to a plane formed by the board surface.

7. The statistical variance calculation principle display board according to claim 1, wherein a holding part is arranged on the display rack.