Math  /  Word Problems

QuestionFind the percentage of people with IQs between 55 and 145, given a mean of 100 and a standard deviation of 15.

Studdy Solution
Since the z-scores for55 and145 are -3 and3 respectively, we know from the standard deviation rule that approximately99.7% of the data falls within these values.
Therefore, according to the standard deviation rule,99.7% of people have an IQ between55 and145.

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