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The shoe sizes of 57 teenagers have a normal distribution, with a mean size of 7 and a standard deviation of 1.25. One of the

The shoe sizes of 57 teenagers have a normal distribution, with a mean size of 7 and a standard deviation of 1.25. One of the teens is chosen at random and has a shoe size of 10. How many standard deviations above or below the mean is a shoe size of 10

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