Are community college students' abilities to follow detailed instructions determined by their parents' political leanings (0=liberal, 1=conservative), by their composition instructors' educational level (0=bachelor; 1=master; 2=doctor), or by both? The data below represent responses on an instrument designed to examine subjects' ability to follow detailed instructions (Detailed Instructions Measurement, DIM).

Data file:  anovastudy4.sav
Variables: POLIT, IED, DIM 

PERS  IED  POLIT     DIM
1       0      1    1677
2       0      1    1296
3       0      1    1586
4       0      1    2042
5       0      1    1084
6       0      1    1693
7       0      1    1294
8       0      1    1112
9       0      1    2034
10      0      1    1147
11      0      1    1030
12      0      1    1197
13      0      1    1560
14      0      0    1479
15      0      0    1464
16      0      0     782
17      0      0    1250
18      0      0    1059
19      0      0    1099
20      0      0    1362
21      0      0    1252
22      0      0    1387
23      0      0    1648
24      0      0    1440
25      0      0    1312
26      0      0    1556
27      1      1    1022
28      1      1    1105
29      1      1     856
30      1      1    1643
31      1      1    1252
32      1      1    1184
33      1      1    1208
34      1      1    1101
35      1      1    1457
36      1      1    1636
37      1      1    1479
38      1      1    1659
39      1      1    1111
40      1      0    1183
41      1      0    1108
42      1      0     900
43      1      0    1227
44      1      0    1181
45      1      0     790
46      1      0    1249
47      1      0    1338
48      1      0    1134
49      1      0    1134
50      1      0     682
51      1      0     916
52      1      0    1300
53      2      1    1224
54      2      1     934
55      2      1     990
56      2      1    1293
57      2      1     926
58      2      1     956
59      2      1     937
60      2      1     662
61      2      1    1124
62      2      1     996
63      2      1    1256
64      2      1    1099
65      2      1     720
66      2      0    1204
67      2      0    1219
68      2      0    1062
69      2      0     837
70      2      0     844
71      2      0    1036
72      2      0     929
73      2      0    1289
74      2      0     746
75      2      0     676
76      2      0     920
77      2      0    1398
78      2      0     896

Answer the following questions: 

1. Do the data appear to be normally distributed? Is there any problem with homogeneity of variances? Explain in full.
    
    
2. What kinds of data do the three columns of interest represent?
    
    
    
3. How many independent variables and levels do the data have?
    
    
4. Explain which statistic you used and why.
    
    
    
5. Copy the two (possibly three) relevant F-statistics/H-statistics and write whether or not the .05 level of significance is attained for each.
    
    
    
    
6. Does the result of the comparison of means tell you if differences exist between all three IED groupings? If not, would it be possible for you to determine where these potential differences are? Would it be possible for you to run a one-way comparion of means with post-hoc Scheffe on a subset of the data?
    
    
7. Is there any significant interaction between IED and POLIT?
    
    
    
8. For significant results, what is (are) the direction(s) of the difference? What do these observations mean in terms of the overall research?