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1. A researcher is interested in studying the effects of using a dress code in middle schools on students' feelings of safety. Three schools are identified as having roughly the same size, racial composition, income levels, and disciplinary problems. The researcher randomly assigns a type of dress code to each school and implements it for the beginning of the school year. In the first school (A), no formal dress code is required. In the second school (B), a limited dress code is used with restriction on the colors and styles of clothing. In the third school (C), school uniforms are required. Six months later, five students from each school are randomly selected and given a survey on fear of crime at school. The higher the score, the safer the student feels. Test the hypothesis that feelings of safety do not differ depending upon school dress codes. School A School B School C w 2 4 N X1 =3.4 X, = 2.0 X, -3.6 SS between SS within df between = 2 df within - 12 MS between MS within = Fobi = 10.36 Forit =