Can you help me answer this please?

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View Policies Current Attempt in Progress 8.1.6 Given the four sample proportions 0.66, 0.4, 0.72, and 0.42, determine the MAD statistic. Round your answer to 3 decimal places, 6.3. 0.583. 8.2.4 Researchers Jemmott Ill et al. (Journal of American Medical Association, 1998) reported a study in which a group of inner-city African American adolescents from Philadelphia were randomly divided into three groups as part of an experiment to assess the effectiveness of different HIV prevention programs. One group was given "abstinence HIV intervention," the next group was given "safer-sex HIV intervention," and the third group was given "health promotion intervention," which was to serve as a control. One outcome that was measured was whether subjects who were sexually active during a three-month period reported consistent condom use. The table shows the summarized data. Abstinence Safer-sex intervention intervention Control Total Consistent Yes 14 20 21 55 condom use? No 20 12 20 52 Total 34 32 41 107 Calculate the chi-square statistic. x =Current Attempt in Progress Consider the MAD statistic. What would happen if you did not take absolute values before calculating the sum of differences between group means? C] You will always get negative differences. C] You could always arrange the differences so that you could get a MAD statistic of zero. C] You won't be able to determine the mean of the differences. D How you arranged the order of subtraction could change the value of the MAD statistic. C] You will always get differences of zero. C] You will always get positive differences. Current Attempt in Progress When testing for an association between class level (Freshman, Sophomore, Junior, Senior) and IQ score, which of the following is NOT an appropriate way to write the alternative hypothesis? 0 At least one of the population IQ means will be different. 0 Not all the population IQ means are the same. 0 pm H50HJR HSR Q There is an association between class level and