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KR-21 is a simplified version of KR-20, which can be used when the difficulty of all items on the test are known to be equal. Like KR-20, KR-21 was first set forth as the twenty-first formula discussed in Kuder and Richardson's 1937 paper. The formula for KR-21 is as such:
JASP (Jeffreys ’s Amazing Statistics Program [ 2 ]) is a free and open-source program for statistical analysis supported by the University of Amsterdam. It is designed to be easy to use, and familiar to users of SPSS.
Administering one form of the test to a group of individuals. At some later time, administering an alternate form of the same test to the same group of people. Correlating scores on form A with scores on form B. The correlation between scores on the two alternate forms is used to estimate the reliability of the test.
According to the CR survey, electric vehicles and full-size pickups had the lowest average reliability scores. Full-size pickup trucks are the least reliable vehicle category, receiving an average ...
Wayne Nelson is an American statistician. His main contributions to the reliability theory are the Nelson-Aalen Estimator for lifetime data, various statistical procedures for accelerated life testing and both: nonparametric and parametric procedures for recurrent data analysis .
TrueDelta.com. TrueDelta.com is a car information site that claims over 106100 registered members as of June 2019 [1] and more than 130,000 registered cars. [2] The site focuses on the reporting of automobile reliability and gas mileage, and also contains vehicle pricing and comparison information. The site utilizes its membership base to ...
Comparison of computer algebra systems. Comparison of deep learning software. Comparison of numerical-analysis software. Comparison of survey software. Comparison of Gaussian process software. List of scientific journals in statistics. List of statistical packages.
Website. [1] RAMP Simulation Software for Modelling Reliability, Availability and Maintainability (RAM) is a computer software application developed by WS Atkins specifically for the assessment of the reliability, availability, maintainability and productivity characteristics of complex systems that would otherwise prove too difficult, cost too ...