Reliability It means the extent to which a test is consistent and dependable. It is concerned with the consistency of responses from moment to moment. However‚ it may not always be valid. Techniques in Testing the Reliability of Assessment Methods or RAM I. Test-retest Method The same test is administered twice to the same group of student and the correlation coefficient is determined. Disadvantages: 1. When the time interval is short‚ the respondents may recall their previous responses resulting
Premium Spearman's rank correlation coefficient Pearson product-moment correlation coefficient Correlation and dependence
Instructor‚ Principles of Epidemiology | PHE5015 S01 FROM: Ferris Corbett‚ Master of Public Health Student DATE: November 12‚ 2016 SUBJECT: Views on Epidemiology According to Aschengrau (2014)‚ study what causes a disease and how it spreads along with the rate of occurrence within the human populations; in addition to applying what is learned from this study to help regulate health issues is what is known as epidemiology. Health Care in General My view of epidemiology when it comes to the health
Premium Public health Health care Health
Epidemiology: Epidemiology is the study of frequency‚ distribution and determinants of health related states and events including diseases and the application of this study to control the disease and other health problems. It can be also described as a branch of evidence based medical science that deals with the incidence‚ distribution and control of diseases in a population chiefly by use of statistics. In other terms‚ it is a sum of the factors controlling the presence or absence of a disease
Premium Epidemiology
Reliability and Validity Paper Samantha Smith BSHS/382- Research and Statistics April 22‚ 2013 ANGELA COLISTRA Introduction Reliability and Validity are two important aspects of research in the human services field and without these tools researchers results would be incomplete. This paper will give examples of the different types of reliability and validity and examples on how they apply to human services research. Also this paper will provide examples of data collection
Premium Psychometrics Reliability Scientific method
Reliability in the design context Weibull Analysis • • • • Practical testing Trends Beta trends Real data for numerical work • Weibull examples Failure rate Early-life failure Wear out Mid-life failure Time in service Failure rate Falling values suggesting initial defects x Rising values suggesting wearing out o x o x x Time in service o o o Failure rate β>1 Β<1 β=1 Time in service Failure modes and effects analysis System/equipment: Analyst: Dwg no‚: Date:
Premium Valve Leak Pressure
Research Synthesis (meta-analysis) Case Study Single subject Design Epidemiology (Case control and Cohort) Experimental Historical (Archival) Epidemiology Research What is Epidemiology? “the study of the distribution and determinants of health related states or events in specified populations‚ and the application of this study to the control of health problems” (Last‚ 1988) Epidemiology Research Terminology Distribution—relates to the frequency and patterns
Premium Epidemiology
Validity A really important aspect that has emerged in our project is validity which must be put into consideration when developing and evaluating a language test‚ since it will allow us to evaluate the utility and appropriateness of the test for our particular purpose and context. Therefore‚ the validity of a test can only be established through a process of validation and in order to carry it out‚ a validation study has to be undertaken‚ on the basis of arriving at a conclusion as to whether
Premium Psychometrics
Software Reliability‚ Modeling and Uncertainty – An Independent Study Software Reliability‚ Reliability Models & Uncertainty Principles - An Independent Study SUBMITTED BY: Bhavya Jain [09ITMG1020CSE ] DEPARTMENT OF CSE & IT ITM UNIVERSITY‚ GURGAON‚ FORMLY KNOWN AS INSTITUTE FOR TECHNOLOGY & MANAGEMENT (AUTONOMOUS UNDER MDU‚ ROHTAK) Bhavya Jain [09ITMG1020CSE] Page 1 Software Reliability‚ Modeling and Uncertainty – An Independent Study CERTIFICATE It is to certify that the work
Premium Failure
Validity Validity addresses whether the assessment measures what it is supposed to measure (Gormley‚ 2011; Van der Vleuten‚ 1996). For both the OSCE stations that I have designed‚ I have created a complimentary mark scheme. As discussed previously‚ I opted to produce a global rating scale for the history-taking station and a checklist for the procedural skill station (appendix 1 and 2). Weighting of items can improve validity of a checklist‚ which can affect which trainees pass or fail (Sandilands
Premium Medical school Assessment Competence
Exam-type questions on Thrust Bearing design 1. You have been asked to design a minimum power-loss‚ uni-directional‚ thrust bearing for an horizontally-mounted‚ axial‚ ammonia compressor in a nitric acid plant. The compressor has a shaft diameter of 100 mm and generates a thrust of 15kN when operating at 6‚000 rpm. The thrust is negligible at zero speed. a. What type of thrust bearing would you recommend and why? b. What are the physical reasons why a dry‚ PTFE bearing would
Premium Bearing Ball bearing Orders of magnitude