Chi Square Homework PSYC 3121 Homework 20 points An instructor is concerned that male and female students have different outcomes for their introductory psychology class. The instructor collects information about the final grades of 355 male and female students in the previous semester's class. Complete the tables below and compute a chi-square test of independence to determine if there is an association between gender and nal course grade. For expected frequencies round up or down to whole numbers: for (0- E)1/E round to at least 2 decimal places. OBSERVED Frequencies (O): A B C Total WI. EXPECTED Frequencies (E): -IIII Male (M) Female {Willi Category O E (O-E) (O-E) (O-E)ME M; A ? ? ? M; B ? ? ? 2 ? M; C ? ? M; D/F ? ? ? F; A 12 2 2 F; B ? ? ? ? F; C 1? ? ? 2 F; D/F ? ?1 ? X2=? df = ? alpha .05= ? D =Observed frequency : A B C D/ F Total Male 48 37 71 14 170 Female 60 51 66 8 185 Total 108 8 8 137 22 355 Expected frequency: We have to round up or down to whole numbers. so, it will be A B C D/F Male (M) 52 42 66 1 1 Female (F ) 56 46 Total 108 88 137 22 Thired chart: category 0 E (O-E) (0-E ) " (0- E ) E M, A 48 52 - I 16 0. 31 37 42 - 5 25 0.60 M, B 71 66 5 25 0. 38 M, C M, D/ F 14 11 1 3 9 0.82\f