One study stated the research hypothesis, “Violence behavior in children may be reduced by teaching them conflict resolution skills” (DuRant et al., 1996). The variable “violence behavior” was measured by the number of fights in which each student was involved. Below is a frequency distribution table for the number of fights for 12 students.

a. Calculate the variance (s²) and standard deviation (s) of the number of fights using either the definitional or the computational formulas.

b. Based on your value of the standard deviation, what is the average difference between the number of fights a student got involved in and the mean?

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# Fights f % # Fights f % 4 1 8% 1 1 8% 3 2 17% 0 3 25% 2 LO 5 42% Total 12 100%