SAT, 15.12.2021 23:10 onlymyworld27

A sociological study of gang members in a large Midwestern city found the mean age of the gang members in the study to be 14.5 years and the standard deviation to be 1.5 years. At least what percent will be between 10.0 and 19.0 years of age?

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A sociological study of gang members in a large Midwestern city found the mean age of the gang membe...