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Four practical strategies have been developed that provide workable methods of estimating test reliability. [7] 1. Test-retest reliability method: directly assesses the degree to which test scores are consistent from one test administration to the next. It involves: Administering a test to a group of individuals
The item-reliability index (IRI) is defined as the product of the point-biserial item-total correlation and the item standard deviation. In classical test theory, the IRI indexes the degree to which an item contributes true score variance to the exam observed score variance. In practice, a negative IRI indicates the relative degree which an ...
Reliability Engineering and Risk Analysis: A Practical Guide (ISBN 9781498745871) is a textbook on techniques for analysis of reliability and risk, written by Mohammad Modarres, Mark Kaminskiy, and Vasiliy Krivtsov. [1] [2]
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Let's look at DirecTV (NAS: DTV) and three of its industry peers, to see how efficiently they use cash. Here are the ROIC figures for each company over a few periods. Here are the ROIC figures for ...
Congeneric reliability applies to datasets of vectors: each row X in the dataset is a list X i of numerical scores corresponding to one individual. The congeneric model supposes that there is a single underlying property ("factor") of the individual F , such that each numerical score X i is a noisy measurement of F .
DirecTV will launch MyFree DirecTV, a new free streaming TV service, in November. It will have free live TV channels and on-demand shows with ads. DirecTV has a new free streaming service coming.
Check out AOL’s options for accessing the internet via highspeed or dial-up connections. Get Online with AOL. ... Download time may take 3-4 hours over dial-up ...