Compare and contrast the benefits of the Stanford-Binet IQ test and Wechsler's IQ tests.
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What is one major difference between the Stanford-Binet intelligence test and those designed by David Weschler? The Stanford-Binet test was universally used, while Weschler created a test for adults and children. The Stanford-Binet test measured intellectual ability, while the Weschler test measured multiple intelligences. Weschler created a test using performance and nonperformance items, while the Stanford-Binet test measured multiple intelligences. Weschler created a test that measured general intelligence (g) and specific intelligence (s), while the Stanford-Binet test measured three primary intelligences. The Stanford-Binet measured nine primary intelligences, while Weschler created tests measuring three primary intelligences.
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IQ Scores According to the Stanford-Binet IQ test, a normal IQ score is 100 . It can be shown that anyone with an IQ $x$ that satisfies the inequality $\left|\frac{x-100}{15}\right|>1.96$ has an unusual IQ score. Determine the IQ scores that would be considered unusual.
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IQ and reading scores Data on the 1$Q$ test scores and reading test scores for a group of fifth-grade children give the following regression line: predicted reading score $=-33.4+0.882(1 Q \text { score). }$ (a) What's the slope of this line? Interpret this value in context. (b) What's the intercept? Explain why the value of the intercept is not statistically meaningful. (c) Find the predicted reading scores for two children with IQ scores of 90 and 130 , respectively.
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