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For the following, consider that IQ scores are normally distributed with a mean of 100 and...

  1. For the following, consider that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
    1. Find the probability that a person has an IQ below 60
  1. Find the probability that a randomly selected person has an IQ between 60 and 85

  1. Find the probability that a randomly selected person has an IQ above 118.

  1. Find the IQ score that cuts off the lower 25% of the population from the upper 75%.

  1. Find the probability that 10 people will have a mean IQ below 80?

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