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It is often assumed that IQ scores follow a bell-shaped distribution with a mean of 100 and a standard deviation of 16. a. Approximately what

It is often assumed that IQ scores follow a bell-shaped distribution with a mean of 100 and a standard deviation of 16. a. Approximately what percentage of scores are between 84 and 116? b. Approximately what percentage of scores are less than 68? c. Approximately what percentage of scores are more than 84?

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