Hi, I am a teacher trying to determine validity of test questions.
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American officials, however, have questioned the validity of test results for younger cows.
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He points out that the validity of tests is claimed as a property of the tests, rather than how or where they are used.
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There also is increasing controversy over the validity of tests for human growth horomone, testosterone and other substances which are produced naturally in the body.
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The experts reconfirmed the validity of tests by a U . S . Army laboratory in June that found decayed VX nerve agent on missile warheads.
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The world's leading drug control laboratories have affirmed the validity of tests for nandrolone, the banned steroid which has produced a recent spate of positive results.
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Beere said that earlier this year her board had ordered a far-ranging investigation of the validity of test results in 40 countries, including the United States, and had discovered evidence of cheating in only those three.
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