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Randomly selected test scores

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Assume the SAT Mathematics Level 2 test scores are normally distributed with a mean of 500 and a standard deviation of 100. Show all work. Just the answer, without supporting work, will receive no credit.

  1. If a random sample of 64 test scores is selected, what is the standard deviation of the sample mean?
  2. What is the probability that 64 randomly selected test scores will have a mean test score that is between 475 and 525?

Reference no: EM131167985

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