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A sample of midterm scores of 49 online students has a mean of 82. The standard deviation of the sample is 6. find the 80%

A sample of midterm scores of 49 online students has a mean of 82. The standard deviation of the sample is 6.

  1. find the 80% confidence interval of the mean midterm scores of the online students
  2. find the 99% confidence interval of the mean midterm scores of the online students

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