Homework Exercise#3 - Chi-Square Test & Review Name: 1.) [DA2] Multiple Choice. Answer: The null hypothesis in the chi-square test states that a. The rows and columns in the table are associated b. The rows and columns in the table are not associated c. Neither of the two 2.) [DA2] Multiple Choice. Answer: For the chi-square test to be effective, the expected value for each cell in the contingency table has to be at least a. 0 b. 3 C. 5 d. 10 3.) [DA2] Multiple Choice. Answer: Contingency tables and degrees of freedom are key elements of the chi-square test a. True b. False For theFor questions#4 to 8, use the following information. A parent advisory board for a certain university was concerned about the effect of parttime jobs on the academic achievement of students attending the university. To obtain some information, the advisory board surveyed a simple random sample of 200 of the more than 20,000 students attending the university. Each student reported the average number of hours spent working part-time each week and his or her perception of the effect of part-time work on academic achievement. The data in the table below summarize the students' response by average number of hours worked per week (less than 11, 11 to 20, more than 20) and perception of the effect of part-time work on academic achievement (positive, no effect, negative). A chi-square test was used to determine if there is an association between the effect of part-time work on CESQUARE'IET academic achievement and the average number of hours Expected m a printed m ow W per week that students work. Computer output that resulted from performing this test is shown a_t right. 20 Total - Positive 21 9 5 3S 4.) [DA2]_ State the null and the alternative hypotheses 16.915 11.000 6.825 for this test. No e'ect 58 32 IS 105 5.) [DA2] Discuss whether the conditions for a 50.925 33.600 20.475 chi-square test are met for these data. . Neganve 18 23 19 60 29.100 19110 11.100 6.) [DA2] Given the results from the chisquare test, what should the advisory board conclude? Total 97 64 39 200 7.) [DA3] State the smallest expected cell count. Chi's'l = 13-933' DP = 4. P'V'l'\" = 0-007 8.) [DA3] According to Bonferroni adjustment, what should be an acceptable level of signicance