CN203070415U - Random extractor specially for statistics - Google Patents
Random extractor specially for statistics Download PDFInfo
- Publication number
- CN203070415U CN203070415U CN 201320048668 CN201320048668U CN203070415U CN 203070415 U CN203070415 U CN 203070415U CN 201320048668 CN201320048668 CN 201320048668 CN 201320048668 U CN201320048668 U CN 201320048668U CN 203070415 U CN203070415 U CN 203070415U
- Authority
- CN
- China
- Prior art keywords
- ball
- ball device
- containing device
- stirrer
- statistics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a random extractor specially for statistics and relates to the field of auxiliary teaching supplies. The random extractor specially for statistics comprises a ball containing device, wherein the ball containing device is made of glass; the upper end of the ball containing device is provided with a ball inlet; a concave hole is formed in the middle of the ball containing device; a stirrer is arranged in the ball containing device; the stirrer is connected with a rotating handle through the concave hole; the lower end of the ball containing device is provided with a ball outlet; the bottom end of the ball containing device is connected with a ball selecting box; the ball selecting box is made of plastics; the upper end of the ball selecting box is provided with an inclined plate; a plug is arranged on the inclined plate; the plug is made of a wood plate; the outer side of the plug is provided with a handle; the bottom of the ball selecting box is provided with an exhaust port; the end of the exhaust port is provided with a valve; the upper part of the ball containing device is provided with a lifting strap; and the lifting strap is made of a cloth tape. The random extractor has the beneficial effects of simple structure, convenience in use and t operation, and the sampling accuracy can be improved.
Description
Technical field
The utility model relates to teaching assistant product field, relates in particular to a kind of statistics special use and randomly draws device.
Background technology
Statistics be one by search, arrangement, analyze means such as data, reaching the essence of inferring the object of being surveyed, even a comprehensive science in forecasting object future.Wherein used the professional knowledge of a large amount of mathematics and other subject, its usable range has almost covered social science and natural science applied every field.In statistics, often need sampling, in a population sample, extract one or several out, calculated mutually deserved probability situation, sampling Shi Doushi teacher is placed on versicolor ball in the special pocket in teaching process now, hand placement extracts after therein ball being mixed again then, such simple sampling mode can not reach ball good mixed effect, and more human factor is arranged inside, will cause the inaccurate problem of sampling results.
Summary of the invention
The utility model is at the prior art above shortcomings, and device is randomly drawed in a kind of statistics special use that provides, and versicolor ball is placed on contains that the beating action by stirrer can fully make it mix in the ball device, the accuracy of probability when increasing sampling.
The purpose of this utility model is to be achieved through the following technical solutions:
Device is randomly drawed in a kind of statistics special use, comprise and contain the ball device, described Sheng ball device is made by glass, described Sheng ball device upper end is provided with ball hole, the middle part is provided with pothole, be provided with stirrer in the described Sheng ball device, described stirrer is connected with turning handle by pothole, and described Sheng ball device lower end is provided with ball mouth, described Sheng ball device bottom is connected with the case of choosing shuttles, the described case of choosing shuttles is made of plastics, and the described case upper end of choosing shuttles is provided with swash plate, and described swash plate is provided with stopper, described stopper is made by plank, the described stopper outside is provided with handle, and the described case bottom of choosing shuttles is provided with escape hole, and described escape hole end is provided with valve.
Described Sheng ball device top is provided with belt, and described belt is made by strap.
The utility model beneficial effect: simple in structure, easy to use, easy to operate, can increase the accuracy rate of sampling.
Description of drawings
Fig. 1 randomly draws the device structural representation for statistics special use described in the utility model.
Among the figure:
The 1-ball hole; 2-contains the ball device; The 3-stirrer; The 4-turning handle; The 5-ball mouth; The 6-stopper; The 7-handle; The 8-case of choosing shuttles; The 9-escape hole; The 10-valve; The 11-swash plate; The 12-belt.
Embodiment
Be described in further detail with the utility model of embodiment with reference to the accompanying drawings below:
As shown in Figure 1, device is randomly drawed in a kind of statistics special use, comprise and contain ball device 2, described Sheng ball device 2 is made by glass, glass transparent and the impact that can bear are bigger, described Sheng ball device 2 upper ends are provided with ball hole 1, ball hole 1 is the entrance of spheroid in containing ball device 2, described Sheng ball device 2 middle parts are provided with pothole, be provided with stirrer 3 in the described Sheng ball device 2, stirrer 3 is used for stirring, can make that being placed on the versicolor spheroid of containing in the ball device 2 mixes fully, described stirrer 3 is connected with turning handle 4 by pothole, turning handle 4 rotates and can drive stirrer 3 work, described Sheng ball device 2 lower ends are provided with ball mouth 5, ball mouth 5 is the outlet of spheroid in containing ball device 2, described Sheng ball device 2 bottoms are connected with the case 8 of choosing shuttles, contain the spheroid of selecting in the ball device 2 and will enter into the case 8 of choosing shuttles, the described case 8 of choosing shuttles is made of plastics, plastic quality is light and with low cost, plastics are transparent material simultaneously, can be observed the situation in the case 8 of choosing shuttles, described case 8 upper ends of choosing shuttles are provided with swash plate 11, spheroid enters in the case 8 of choosing shuttles by swash plate 11, and described swash plate 11 is provided with stopper 6, and stopper 6 can be blocked choose shuttles case 8 and the interface of containing ball device 2, when stirrer 3 work, can stop spheroid to enter into to choose shuttles in the case 8, described stopper 6 is made by plank, and described stopper 6 outsides are provided with handle 7, and described case 8 bottoms of choosing shuttles are provided with escape hole 9, spheroid in the case 8 of choosing shuttles is emitted by escape hole 9, and described escape hole 9 ends are provided with valve 10.Described Sheng ball device 2 tops are provided with belt 12, and the design of belt 12 can be convenient for carrying contains ball device 2, and described belt 12 is made by strap, and strap is comparatively soft, prevents from hurting carrier's palm part.
During use, versicolor ball is put in the Sheng ball device 2 by ball hole 1, shake turning handle 4, stirrer 3 namely begins to carry out stirring work, the spheroid of containing in the ball device 2 can be mixed fully, mix the back and pull out stopper 6 by handle 7, the spheroid of choosing will drop in the case 8 of choosing shuttles by swash plate 11, observe its color and record, after opening valve 10 ball being emitted from escape hole 9, repeat above-mentioned experiment, can calculate statistical sampling probability comparatively accurately.
Claims (2)
1. device is randomly drawed in a statistics special use, it is characterized in that: comprise and contain the ball device, described Sheng ball device is made by glass, described Sheng ball device upper end is provided with ball hole, the middle part is provided with pothole, be provided with stirrer in the described Sheng ball device, described stirrer is connected with turning handle by pothole, and described Sheng ball device lower end is provided with ball mouth, described Sheng ball device bottom is connected with the case of choosing shuttles, the described case of choosing shuttles is made of plastics, and the described case upper end of choosing shuttles is provided with swash plate, and described swash plate is provided with stopper, described stopper is made by plank, the described stopper outside is provided with handle, and the described case bottom of choosing shuttles is provided with escape hole, and described escape hole end is provided with valve.
2. device is randomly drawed in a kind of statistics special use as claimed in claim 1, it is characterized in that: described Sheng ball device top is provided with belt, and described belt is made by strap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048668 CN203070415U (en) | 2013-01-29 | 2013-01-29 | Random extractor specially for statistics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320048668 CN203070415U (en) | 2013-01-29 | 2013-01-29 | Random extractor specially for statistics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203070415U true CN203070415U (en) | 2013-07-17 |
Family
ID=48769180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320048668 Expired - Fee Related CN203070415U (en) | 2013-01-29 | 2013-01-29 | Random extractor specially for statistics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203070415U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898163A (en) * | 2017-04-07 | 2017-06-27 | 贵州大学 | Classroom questioning wheel disc is used in a kind of ideological education teaching |
| CN108364533A (en) * | 2018-02-08 | 2018-08-03 | 鄢月红 | A kind of education and instruction pumping answer equipment |
| CN109615981A (en) * | 2019-01-30 | 2019-04-12 | 宿州学院 | A kind of automation probability statistics compiling device |
-
2013
- 2013-01-29 CN CN 201320048668 patent/CN203070415U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898163A (en) * | 2017-04-07 | 2017-06-27 | 贵州大学 | Classroom questioning wheel disc is used in a kind of ideological education teaching |
| CN108364533A (en) * | 2018-02-08 | 2018-08-03 | 鄢月红 | A kind of education and instruction pumping answer equipment |
| CN109615981A (en) * | 2019-01-30 | 2019-04-12 | 宿州学院 | A kind of automation probability statistics compiling device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203070415U (en) | Random extractor specially for statistics | |
| Lund et al. | The inverted microscope method of estimating algal numbers and the statistical basis of estimations by counting | |
| CN205507961U (en) | Teaching is with lots device | |
| CN209727776U (en) | Portable pesticide residue detection device | |
| CN206619316U (en) | Probability Principles experimental bench | |
| CN202974995U (en) | Rapid food security detection box | |
| CN204158985U (en) | Table tennis bat | |
| CN107966573A (en) | One kind is easy to use to test pregnant pen | |
| CN204557872U (en) | A kind of mathematical probabilities demonstration device | |
| CN207208830U (en) | The portable unit box that a kind of pipette tips import | |
| CN203732451U (en) | Detection device suitable for scan detection of mobile phone camera | |
| CN206832491U (en) | A kind of soil profile sampling apparatus | |
| CN204789475U (en) | Ripe judgement device of spring watermelon | |
| Heiner et al. | Educational data mining | |
| CN210293804U (en) | Stratified sampler for fluid animal manure | |
| CN103592247A (en) | Device and method for detecting pesticide residues in fruits and vegetables | |
| CN206502153U (en) | It is a kind of to be easy to mobile medical science quarantine sampler tray | |
| CN204855456U (en) | Ripe judgement device of elasticity rod -type watermelon | |
| CN201192582Y (en) | Toy lot casting device | |
| CN206453420U (en) | A kind of new private school's children intelligence development schooling apparatus | |
| CN209662241U (en) | Spittoon holding | |
| CN203000639U (en) | High-efficiency egg separating device | |
| CN205506831U (en) | AIDS quick self -detecting kit | |
| CN205073648U (en) | A deal out cards device and machine of dealing out cards for dealing out cards machine | |
| CN203929423U (en) | Rice Outer-quality detector get a meter device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20140129 |