Questions # 5-6 refer to the following information: A set I scores of 300 adults has a symmetric, bell-shaped distribution with the mean = 100 and standard deviation = 15. (5) Which of following is Not true? (A) A negative z-score would correspond to an IQ score lower than 90 (B) Over 200 of the IQ scores lie between 85 and 115. (C) There are more IQ scores between 100 and 115 than between 70 and 85 (D) 65 is an unusually low IQ score. (6) Based on the Empirical Rule, can we say that an IQ score of 131 is unusually high? Worl 1 (A) Yes because 134 is 35 more than the mean Yes because 13$ is more than two times the standard deviation above the mean (C) No because half of 300 is 150 (D) Cannot be determined because we don't have the individual IQ scores of all 300 adults. 1

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