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There are 2,000 students who took the ACT. 500 are sampled, and reveals a mean composite test score of 23.4. The standard deviation for the

There are 2,000 students who took the ACT. 500 are sampled, and reveals a mean composite test score of 23.4. The standard deviation for the exam nationwide is 5.1. Using a 0.90 confidence level, what is the LOW range of the confidence interval?

There are 2,000 students who took the ACT. 500 are sampled, and reveals a mean composite test score of 23.4. The standard deviation for the exam nationwide is 5.1. Using a 0.90 confidence level, what is the HIGH range of the confidence interval?

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