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solve it correctly please. I will rate accordingly. Scores on a standardized exam are known to follow a normal distribution with standard deviation o =

solve it correctly please. I will rate accordingly.

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Scores on a standardized exam are known to follow a normal distribution with standard deviation o = 14. A researcher randomly selects 85 students and computes their average score. He reports that the mean score is 74.1, with a margin of error of 2.802. How confident are you that the mean score for all students taking the exam is in the interval (71.298, 76.902)? Confidence = %

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