A researcher designs an intervention to combat anti-Arab oppression. He also designs a questionnaire to measure anti-Arab oppression so he can test the participants #x27; level of anti-Arab oppression before and after the intervention. He tests one version of his questionnaire with 45 statements and a shorter version with 12 statements. In both questionnaires, the participants respond to each statement with a rating on a 5-point Likert scale, with 0 equaling #x27;strongly disagree #x27; and 4 equaling #x27;strongly agree #x27;. The overall score for each participant is the mean of his or her ratings for the different statements on the questionnaire. Look at the following graphs. Graph I graphs the results from the short version, and Graph II graphs the results from the long version. Graph I Graph II PARTICIPANTS PARTICIPANTS SHORT QUESTIONNAIRE SCORE LONG QUESTIONNAIRE SCORE Complete the following sentences by trusting your eyes to see meaningful differences in the two graphs. The range for Graph I is... The range for Graph II is... The mean for Graph I is... The mean for Graph II is... The variance for Graph I is... The variance for Graph II is... This implies that the shorter questionnaire will be better than the longer questionnaire at detecting differences before and after the intervention.
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