Question: The mean of a normally distributed data set is 110, and the standard deviation is 15. a) Use the Empirical Rule to find the probability

  • The mean of a normally distributed data set is 110, and the standard deviation is 15. a) Use the Empirical Rule to find the probability that a randomly-selected data value is greater than 95. b) Use the Empirical Rule to find the probability that a randomly-selected data value is greater than 125.
  • A psychologist wants to estimate the proportion of people in a population with IQ scores between 80 and 140. The IQ scores of this population are normally distributed with a mean of 110 and a standard deviation of 15. Use the Empirical Rule to estimate the proportion.
  • The mean of a normally distributed data set is 110, and the standard deviation is 15. a) Use the standard normal table to find the probability that a randomly-selected data value is greater than 95. b) Use the standard normal table to find the probability that a randomly-selected data value is greater than 125.

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