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Which of the following statements about reliability of a test are correct ?
(i) Reliability is fixed for a given test. (ii) It is a correlation of the test with itself. (iii) It varies from sample to sample. (iv) It is not affected by the size of the sample. (v) High reliability ensure high validity. Choose the correct answer from the code given below : Code :
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Eduncle Best Answer
Test reliablility refers to the degree to which a test is consistent and stable in measuring what it is intended to measure. Most simply put, a test is reliable if it is consistent within itself and across time. To understand the basics of test reliability, think of a bathroom scale that gave you drastically different readings every time you stepped on it regardless of whether your had gained or lost weight. If such a scale existed, it would be considered not reliable. Thus reliability is a correlation of the test with itself and varies from sample to sample.