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6.2 Exercise 16

Avg difficulty 2.5

Two thousand students took an exam. The scores on the exam have an approximate normal distribution with a mean μ = 81 points and standard deviation σ = 15 points.

  1. Calculate the first- and third-quartile scores for this exam.
  2. The middle 50 percent of the exam scores are between what two values?

OpenStax Statistics, 6.2 Using the Normal Distribution, exercise 16

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