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Scores on an IQ test are normally distributed. A sample of 50 IQ scores had standard deviation s = 20. The developer of the

Scores on an IQ test are normally distributed. A sample of 50 IQ scores had standard deviation s = 20. The developer of the test claims that the population standard deviation is = 24. Do these data provide sufficient evidence to contradict this claim? Use the a=0.01 level of significance.

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