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04-11-2022
Mathematics

Answered

Scores on a standardized exam are known to follow a normal distribution with standard deviation = 16. A researcher randomly selects 110 students and computes their average score. He reports that the mean score is 74.7, with a margin of error of 1.471.
How confident are you that the mean score for all students taking the exam is in the interval (73.229, 76.171)?

Confidence = ______ %

Answer :

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