AshleyDurbanSA
New member
- Jul 4, 2008
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...distribution with a mean of 100 and a standa? Scores on an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 16.
Which one of the statements below is incorrect?
(1) Using the empirical rule, we can say that approximately 68% of the values lie between 84 and 116.
(2) Using the empirical rule, we can say that approximately 99.7% of the values lie between 52 and 148.
(3) If the data for the IQ test is relatively skewed and the standard deviation, s, is unknown, s is
approximately range/6.
(4) A special case of a bell-shaped distribution of measurements, is the normal distribution.
(5) The standardized score (for the IQ test above) for a test score of 74 is equal to -1.625.
Which one of the statements below is incorrect?
(1) Using the empirical rule, we can say that approximately 68% of the values lie between 84 and 116.
(2) Using the empirical rule, we can say that approximately 99.7% of the values lie between 52 and 148.
(3) If the data for the IQ test is relatively skewed and the standard deviation, s, is unknown, s is
approximately range/6.
(4) A special case of a bell-shaped distribution of measurements, is the normal distribution.
(5) The standardized score (for the IQ test above) for a test score of 74 is equal to -1.625.