Question: Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation s = 8. a. Construct a 95% confidence

Scores on an IQ test are normally distributed. A sample of 25 IQ scores had standard deviation s = 8.

a. Construct a 95% confidence interval for the population standard deviation σ.

b. The developer of the test claims that the population standard deviation is σ = 15.

Does this confidence interval contradict this claim? Explain.

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