definitionSuccessful statistical practice is based on focused problem definition. In sampling‚ this includes defining the population from which our sample is drawn. A population can be defined as including all people or items with the characteristic one wishes to understand. Because there is very rarely enough time or money to gather information from everyone or everything in a population‚ the goal becomes finding a representative sample (or subset) of that population. Sometimes that which defines a population
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EMP 5103 Reliability‚ Quality and Safety Engineering Dhillon‚ B‚ Reliability‚ Quality and Safety for Engineers‚ CRC Press‚ Boca Raton‚ Florida‚ 2005 Marks Report Mid Term Final Exam 30% 30% 40% Mar 30 Mar 2 Apr 6 Report Format : - Title - Summary 1- Introduction 2- Main Body Chapter 1 Chapter 2 3- Conclusion 4- References Books 1. Reiche‚ H.‚ Human Reliability‚ Pergaman Press‚ New York‚ 1986 Journal Articles 1. Willams‚ R.‚ Engineering Design‚ Journal of Mechanical Engineering‚ Vol‚ 10‚ 1982
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Reliability Improvement Reliability of a scale is improved by pruning of weak items. Deleting a weak item from a measurement scale may sometimes lead to jeopardizing scale’s theoretical construct. When this happens‚ the item needs to be redesigned and revaluated. Wording of items in a measurement scale plays an important role in determining its discriminating power. Weak items in the scale are identified by computing Corrected Item-Total Correlation (CITC) (Ferketich‚ 1991) and Item-Deleted Cronbach’s
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involves crime rates‚ the level of measurement required is interval. As interval level of measurement describes variables that have differences between them numerically. Therefore‚ all crime rates are interval level measurements. The purpose of content validity is to measure the significant variables within the research. Further it can be used to quantify the adequate sampling of substance areas of questionnaires to determine content relevance. Content validity requires two logical estimations
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Analytical measurement: measurement uncertainty and statistics Ricardo Bettencourt da Silva‚ Ewa Bulska‚ Beata Godlewska-Żyłkiewicz‚ Martina Hedrich‚ Nineta Majcen‚ Bertil Magnusson‚ Snježana Marinčić‚ Ioannis Papadakis‚ Marina Patriarca‚ Emilia Vassileva‚ Philip Taylor Editors: Nineta Majcen‚ Vaidotas Gegevičius Joint Research Centre Analytical measurement: measurement uncertainty and statistics Editors: Nineta Majcen Vaidotas Gegevičius Authors: Ricardo Bettencourt da
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An instrument or procedure that measures attibutes or properties of an individual I see ferried to as a TEST The precision‚ consistency‚ or repeat ability of questions or tests specifically refers to ACCOUNTABILITY Measurement TAKES PLACE WHEN SCORES ARE OBTAINED The word or phrase which best describes the relationship between test‚ measurment‚ and evaluation is VERY MUCH RELATED Which of the following provides performance indicators‚ assessment tasks‚ and rubrics for measuring student achievement
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Statistical process control (SPC) is the application of statistical methods to the monitoring and control of a process to ensure that it operates at its full potential to produce conforming product. Under SPC‚ a process behaves predictably to produce as much conforming product as possible with the least possible waste. While SPC has been applied most frequently to controlling manufacturing lines‚ it applies equally well to any process with a measurable output. Key tools in SPC are control charts
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Research Skills 2012: page 1 APA format for statistical notation and other things: Statistical abbreviations: ANCOVA ANOVA α β Analysis of Covariance Analysis of Variance alpha‚ the probability of making a Type 1 error in hypothesis testing beta‚ the probability of making a Type 2 error in hypothesis testing CI d d’ df confidence interval Cohen’s measure of effect size d-prime (a measure of sensitivity‚ used in Signal Detection Theory) degrees
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TOOLS OF RESEARCH * Research Tool – is a specific mechanism or strategy the researcher uses to collect‚ manipulate‚ or interpret data. * Research Methodology – is the general approach the researcher takes in carrying out the research project‚ to some extent‚ this approach dictates the particular tools that the researcher selects. THE SIX GENERAL TOOLS OF RESEARCH 1. The library and its resources For thousands of years‚ the library served primarily as a repository of books and manuscripts
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SPA Lab 4: CONTRAST SENSITIVITY FUNCTION Ciara Dubose University of Central Oklahoma Abstract The purpose for this experiment is to determine at which spatial frequency does a participant’s visual acuity for a contrast sensitivity function display a peak performance across different sine – wave gratings. The ability to contrast sensitivity is useful in everyday life‚ more than people imagine. These contrast sensitivity functions focus primarily on the participants’ ability to detect accurately
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