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Z-scores (20 points total) The average age reported for onset into delinquent activity for the population of prison inmates is 12 with a standard deviation

Z-scores (20 points total)

The average age reported for onset into delinquent activity for the population of prison inmates is 12 with a standard deviation of 2.4. Based on this information and assuming the population is normally distributed:

Z=(X-)/s

An inmate's age of one set is 17. Is he in the top 15% of ages? (5 points)

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