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Definition Booklet - Department of Statistics Oxford
Definition Booklet - Department of Statistics Oxford

electronic instrumentation
electronic instrumentation

Doing Statistics by Rule-of-Thumb.
Doing Statistics by Rule-of-Thumb.

... It would be a bit of a coincidence if the data exactly matched the hypothesis, even if the hypothesis is true. Inevitably, experimental errors will lead to some discrepancies. So, we don’t want to throw out the hypothesis too easily; we can’t throw it out any time there is a small discrepancy. The t ...
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Chapter 8: Descriptive Statistics - research

... to data in order to organize, summarize, or better understand the information, we are using statistical methods. These methods can range from somewhat simple computations such as determining the mean of a distribution to very complex computations such as determining factors or interaction effects wi ...
Appendix A
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... In this section we develop a procedure to test the hypotheses about the relative values of the variances of two normally distributed populations. The following example illustrates the use of the test: · Economists commonly use variance of rate of return on a stock as the measure of volatility of a s ...
Chapter_10_11
Chapter_10_11

... we compare this p-value to some standard called a “level of significance” which means that if the p-value is below, i.e. less than, this standard the relationship is deemed statistically significant. That is, the correlation is statistically different from zero. A value of 0.05 or 5% is a common val ...
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Lecture No.2 Inference For Two Population Mean The pooled t test

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... mental processes and allow us to better understand the behavior and mental process of those around us?  How do biological and environmental factors shape our personality development?  What are the methods of research that psychologists use to perform ethical, credible, and logical research?  What ...
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Econ 3780: Business and Economics Statistics

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AP Statistics Date Released 2002 MC Section I Choose the best

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22.nonexp4 - Illinois State University Department of Psychology

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2030Lecture4

< 1 ... 70 71 72 73 74 75 76 77 78 ... 151 >

Psychometrics

Psychometrics is a field of study concerned with the theory and technique of psychological measurement. One part of the field is concerned with the objective measurement of skills and knowledge, abilities, attitudes, personality traits, and educational achievement. For example, some psychometric researchers have, thus far, concerned themselves with the construction and validation of assessment instruments such as questionnaires, tests, raters' judgments, and personality tests. Another part of the field is concerned with statistical research bearing on measurement theory (e.g., item response theory; intraclass correlation).As a result of these focuses, psychometric research involves two major tasks: (i) the construction of instruments; and (ii) the development of procedures for measurement. Practitioners are described as psychometricians. All psychometricians usually possess a specific qualification, and while most are psychologists with advanced graduate training, many work for the government or in human resources departments. Others specialize as learning and development professionals.
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