Applications: Statistical Process Control and Control Charts: An Application for Statistics Classes

1987 ◽  
Vol 80 (6) ◽  
pp. 474-486
Author(s):  
Marie A. Brooks
Keyword(s):  
High School ◽  
Standard Deviation ◽  
Statistical Process Control ◽  
Real World ◽  
Control Charts ◽  
School Level ◽  
High School Level ◽  
Statistical Process ◽  
Statistical Measures ◽  
And Control

In teaching statistics at the high school level, we attempt to give students an appreciation of the usefulness of statistical measures and techniques. But too frequently we create a group of number-crunching robots who grind through formulas and see no connection to the real world. One way to avoid this dilemma is to use meaningful applications of mean, range, and standard deviation.

scholarly journals Hari Widi Utomo Teaching Writing of Recount Text Using “Freeze! Freeze!” Game in Junior High School Level

2021 ◽  
Vol 6 (2) ◽  
pp. 1225
Author(s):  
Hari Widi Utomo
Keyword(s):  
High School ◽  
Junior High School ◽  
T Test ◽  
Teaching Writing ◽  
School Level ◽  
Control Groups ◽  
High School Level ◽  
Junior High School Level ◽  
And Control ◽  
Positive Effect

One of the most difficult skills in English lesson is teaching writing. Therefore, this study aims to find out the effectiveness of “Freeze! Freeze!” game for teaching writing on grade eight students of SMP N 1 Rakit, Banjarnegara. This study is an experimental research at SMP N 1 Rakit. This study consisted of two groups which are experimental and control groups. In collecting the data, the writer used a test and the result was analyzed by using a t-test to find out the effect of the treatment. After analyzing the data, the writer found that there was a positive effect of the use of “Freeze! Freeze!” game in teaching writing of recount text. It could be seen from the result of hypothesis testing that the t-test was higher than the t-table (3.792>1.997). Thus, it can be concluded that the use of “Freeze! Freeze!” game in teaching writing of recount text was effective.

Predictive Validity of the Biographical Inventory Creativity: Five-Year Follow-up Study

1972 ◽  
Vol 30 (2) ◽  
pp. 471-476 ◽  
Author(s):  
Charles E. Schaefer
Keyword(s):  
High School ◽  
Predictive Validity ◽  
School Level ◽  
High School Level ◽  
Follow Up Study ◽  
Specialty Fields ◽  
And Control

A 5-yr. follow-up study was conducted of the creativity exhibited by 800 creative and control students previously identified at the high school level. The findings indicate that creative youth continue to report more creative achievements than their peers but only in those specialty fields (arts or sciences) in which they had previously distinguished themselves. The data lend support for the predictive validity of the instrument previously developed with these Ss, the Biographical Inventory Creativity.

CONTROLE ESTATÍSTICO DE PROCESSO (CEP) APLICADO NA COLHEITA MECANIZADA DO SORGO

2018 ◽  
Vol 17 (3) ◽  
pp. 490
Author(s):  
JOÃO PAULO BARRETO CUNHA ◽  
MILA SOUZA CASTRO ◽  
ANDERSON GOMIDE COSTA ◽  
MURILO MACHADO DE BARROS ◽  
TULIO ALMEIDA MACHADO ◽  
...  
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Control Charts ◽  
Maximum Level ◽  
Statistical Process ◽  
Forage Sorghum ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
And Control ◽  
The Ideal

RESUMO - A colheita, sendo uma das principais etapas no processo produtivo, precisa manter as perdas dentro de um controle aceitável para que seja possível atingir o máximo nível de qualidade e produtividade. No presente estudo, objetivou-se avaliar as perdas quantitativas durante a colheita mecanizada do sorgo forrageiro por meio do controle estatístico de processo (CEP). O experimento foi arranjado em delineamento inteiramente casualizado (DIC), em que foi realizada a análise de variância para a verificação do efeito significativo da declividade e da velocidade operacional nas perdas, e, quando significativos, foi submetida ao teste de comparação de médias de Tukey a 5% de significância. Cartas sequenciais e cartas de controle para valores individuais e de amplitude móveis foram utilizadas como ferramentas de controle estatístico de processo para verificar o efeito da velocidade operacional nas perdas. Com base nos resultados obtidos é possível indicar que a faixa de velocidade operacional de 4 a 5 km h-1 apresentou a menor variação dos dados, não apresentando nenhum ponto fora do limite de controle, o que lhe conferiu a condição de faixa ideal para colheita. Com base na análise estatística houve maiores perdas no transporte à medida que se aumenta a faixa de declividade do terreno.Palavras-chave: colheita mecanizada, forragicultura, carta de controle, velocidade operacional. STATISTICAL PROCESS CONTROL (SPC) APPLIED IN THE MECHANIZED HARVEST OF SORGHUM  ABSTRACT - Harvesting is one of the main steps in the production process and it is necessary to keep the losses under control in order to reach the maximum level of quality and productivity. The present study aimed to evaluate the quantitative losses during the mechanized harvesting of forage sorghum using the statistical process control (SPC). The experiment was arranged in a completely randomized design (DIC), and analysis of variance was performed to verify the significant effect of declivity and operational velocity on losses, and the significant was submitted to the Tukey test at 5% significance. Sequential charts and control charts for individual and mobile amplitude values, composed of upper and lower control and average limits, were used as statistical process control tools to verify the effect of operational speed on losses. Based on the results obtained it is possible to indicate that the operational velocity range from 4 to 5 km h-1 presented the lowest variation of data, presenting no point outside of the control limit, being the ideal range for harvest. The statistical analysis showed higher losses in transportation as the slope of the terrain increased.Keywords: Mechanized harvesting, forage farming, control charts, operational speeds.

Dirichlet Polygons—an Example of Geometry in Geography

1986 ◽  
Vol 79 (3) ◽  
pp. 170-173
Author(s):  
Thomas O'Shea
Keyword(s):  
High School ◽  
Elementary School ◽  
Problem Solving ◽  
Real World ◽  
School Level ◽  
High School Level ◽  
The Real ◽  
Axiomatic Systems

The teaching of geometry in the elementary school can be an exciting experience; children are receptive to experimentation, and many activities can be devised to facilitate learning. Generally, however, the use of exploration in geometry decreases as students progress through school and as they begin the study of formal axiomatic systems. In the higher grades we need to present interesting uses of geometry that will allow students to develop their powers of exploration and problem solving. The purpose of this article is to outline an example of how geometry serves as a model in the real world and to suggest how it might be used at the high school level.

scholarly journals A New Approach to Statistical Process Control: Identification of Outliers in Yield Maps

2018 ◽  
Vol 10 (8) ◽  
pp. 334
Author(s):  
Danilo Tedesco de Oliveira ◽  
Leonardo Bernache ◽  
Luan Pereira de Oliveira ◽  
Murilo Aparecido Voltarelli ◽  
Rouverson Pereira da Silva
Keyword(s):  
Standard Deviation ◽  
Process Control ◽  
Statistical Process Control ◽  
Precision Agriculture ◽  
Control Charts ◽  
Production Costs ◽  
Statistical Process ◽  
New Approach ◽  
Individual Control ◽  
Productivity Data

The tools of precision agriculture are of utmost importance in the Brazilian agribusiness, enabling increases in yields and reducing production costs. The use of harvest monitoring systems makes it possible due the possibility to identify pontual problems in an area, however, it becomes necessary to be working properly so it does not acquire incorrect information. Therefore, the purpose with this study was to propose a new approach to identify discrepant points in harvesting maps using statistical process control, as well as to define the best multiple of the standard deviation to identificate these points. The work was conducted during the soybean harvesting at São Geronimo farm in an area of 38 hectares in the municipality of Candido Mota, located in the the state of São Paulo. For gathering information, it was used a Stara crop monitoring system (model Topper Maps) set to record information during harvest in each three second. The productivity data were used to generate an individual control chart to identify points that were out of control so they could be removed. Two standard deviation multiples, that presented an average productivity closer to the average real productivity of the area, were selected. The multiples of the deviations that came closest were the 2σ and 3σ. Two multiples of standard deviation presented an average yield closer to the average real yield of the area. Individual control charts can be used to set control limits and identify possible discrepancies. The multiple of standard deviation 3σ presented information with greater reliability.

scholarly journals Surveillance of Cyclospora cayetanensis Epidemics in USA from Long-Term National Outbreaks Reporting System-Based Monitoring: An Observational Study Using Statistical Process Control Methodologies

2019 ◽  
Vol 2 (1) ◽  
pp. 4-9
Author(s):  
Mostafa Essam Ahmed Mostafa Eissa ◽  
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Control Charts ◽  
Reporting System ◽  
Statistical Process ◽  
Pareto Analysis ◽  
Cyclospora Cayetanensis ◽  
The Usa ◽  
One Year ◽  
And Control

Cyclosporiasis epidemics are caused primarily by food contaminated essentially with Cyclospora cayetanensis protozoa from Phylum Apicomplexa. National Outbreaks Reporting System (NORS) provides comprehensive monitoring and records for outbreaks in the USA. The pattern of the microbial epidemics could be investigated using statistical process control (SPC) techniques including Pareto analysis and control charts. The incidence of this outbreak is higher in some states more than others, especially Florida and transmitted mainly through herbal food constituents as a vehicle. Process-behavior charts show disease patterns and trends with the rate of occurrence per day 14.4%. Most of illness cases tend to occur in the summer environment except for March in one-year due spiking in the number of affected individuals during a solitary outbreak episode.

scholarly journals Improving Process Performance of Cotton Spinning by Using Statistical Process Control Techniques

2020 ◽  
pp. 15-22
Author(s):  
Dereje Girma ◽  
Omprakash Sahu
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Control Charts ◽  
Shop Floor ◽  
Statistical Control ◽  
Statistical Process ◽  
Process Capability Analysis ◽  
Capability Analysis ◽  
R Process ◽  
And Control

Identifying the presence and understanding the causes of process variability are key requirements for well controlled and quality manufacturing. This pilot study demonstrates the introduction of Statistical Process Control (SPC) methods to the spinning department of a textile manufacturing company. The methods employed included X Bar and R process control charts as well as process capability analysis. Investigation for 29 machine processes identified that none were in statistical control. Recommendations have been made for a repeat of the study using validated data together with practical application of SPC and control charts on the shop floor and extension to all processes within the factory.

Research on Statistical Process Control of Packaging & Printing Quality Management

2011 ◽  
Vol 467-469 ◽  
pp. 13-18
Author(s):  
Ying Zhe Xiao ◽  
Ya Nan Huang
Keyword(s):  
Quality Control ◽  
Quality Management ◽  
Statistical Process Control ◽  
Control Chart ◽  
Control Charts ◽  
Basic Tool ◽  
Statistical Process ◽  
Printing Quality ◽  
And Control ◽  
Development Course

This paper states not only the development course of quality management but also the actuality that the packaging & printing enterprise confronts. In addition, it explains the necessity of applying SPC. The first, it is discussed and studied the basic tool of SPC-control chart for statistical process. Based on this way, -R control chart is used to analyze and control the overprint precision. According to these control charts, the spot staffs can find the deficiencies in the quality control itself by finding the correlative process fluctuation and the slow variation in time. In addition, SPC provides objective bases for the quality management personnels to assess semi-products or products quality.

Remote Site Instruction in Physics: A Test of the Effectiveness of a New Teaching Technology

1986 ◽  
Vol 15 (1) ◽  
pp. 61-80 ◽  
Author(s):  
Sidney Rudolph ◽  
Michael K. Gardner
Keyword(s):  
High School ◽  
Instructional System ◽  
Test Site ◽  
Experimental Manipulation ◽  
School Level ◽  
Control Group ◽  
Remote Site ◽  
High School Level ◽  
Physics Instruction ◽  
And Control

This study tested the effectiveness of a remote site instructional system utilizing audio-graphic teleconferencing technology. The subject matter taught was high school level physics. The test site was Bountiful High School in Bountiful, Utah. The study consisted of a treatment-control group comparison in which the treatment group (9 males and 2 females) received the remotely delivered instruction and the control group (14 males and 3 females) received traditional high school physics instruction. The dependent variable was performance on physics tests that were administered periodically during the intervention period. A two-step hierarchical multiple regression was used to analyze the data. During the first step, the experimental and control groups were equated for pre-existing differences in student ability. During the second step, the two groups were tested for differences in performance due to the experimental manipulation. No significant differences in performance were found. The results lead us to believe that audio-graphic teleconferencing is an effective medium for delivering remote instruction.

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