Question

A study of homicide offenders in City X (N = 100) indicated that each offender had an average of two prior felony arrests with a standard deviation of 2.5. Which of following is the Z score for a murder defendant who had five prior felony arrests? O 0.2 O 1.2 O 22 O 3.2

Answer 1

Solution :

Let Y represents the number of prior felony arrests.

We are given the mean and standard deviation of Y as follows :

$\large \mu = 2,\ \ \ \sigma = 2.5$

We have to find the Z score for a murder defendant who had the five prior felony arrests.

The Z-score for a value of Y would be given as follows :

$\large Z = \frac{Y-\mu}{\sigma}$

$\large Z = \frac{5-2}{2.5}$

z = 1.2

Second option is correct.

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