Question
This exercise will use the data file Collegeratings.xls. Description of the Data College ratings contains data on course evaluations, course characteristics, and professor characteristics for
This exercise will use the data file Collegeratings.xls.
Description of the Data
College ratings contains data on course evaluations, course characteristics, and professor characteristics for 200 courses for three academic years at a fictitious university.
Estimate a regression of Course_Eval on Beauty, Intro, OneCredit, Female, Minority, and NNEnglish. Which of the following statements is false?
(a)Beauty is statistically significant at 5% level but not at a 1% level.
(b)Minority is statistically insignificant.
(c)A female instructor has a lower predicted course evaluation than a comparable male instructor.
(d)An instructor that is not a native English speaker (NNEnglish) has a predicted lower course evaluation than a comparable native English speaker instructor and this variable is statistically significant at a 5% level.
(e)None of the above.
course_eval
minority
female
onecredit
beauty
intro
nnenglish
age
4.4
0
1
0
1.509794
0
0
31
4.2
0
0
0
0.588569
0
0
62
4
0
1
0
-0.126
0
0
33
3.4
0
1
0
-0.25819
0
0
51
4.5
0
1
0
0.149693
0
0
33
3.9
0
0
0
0.540917
0
0
47
3.1
1
0
0
0.231613
0
1
35
4
0
0
0
-0.06667
0
0
37
3.8
0
0
0
0.216892
0
0
42
3.4
0
0
0
-0.2587
0
1
49
2.9
0
1
0
0.550288
0
0
37
4.5
0
0
0
-0.06204
0
0
45
4
0
1
0
-0.98239
0
0
56
3.8
0
0
0
-0.05434
1
0
48
4.3
0
1
0
-0.06801
0
0
46
3.4
0
1
0
0.029414
0
0
57
3.4
0
1
0
0.239486
0
0
52
3.3
1
1
0
-0.84873
0
1
29
4.3
0
0
0
-0.73309
0
0
62
4.4
0
0
0
-0.11112
0
0
64
4.6
0
1
0
1.775517
0
0
34
4.2
0
0
0
-0.32185
0
0
58
4
1
0
0
0.211694
0
1
52
3.3
0
0
0
-0.71765
0
0
73
4.4
0
0
0
-0.73269
0
0
70
2.3
0
1
0
0.408168
0
0
41
3.5
0
0
0
-0.01021
0
0
63
4.7
0
0
0
-0.92396
0
0
47
3.9
0
0
0
0.576681
1
0
39
4
1
1
0
-0.0836
1
0
47
4.3
0
0
0
-1.07956
0
0
54
3.8
1
1
0
1.040902
0
0
44
3.8
1
0
0
-1.05211
0
0
47
4
0
0
0
-0.72777
0
0
62
4.6
0
0
0
-0.3954
0
0
60
3.5
0
0
0
0.933396
0
0
37
4.7
0
0
0
-0.23778
0
0
42
4.2
0
0
0
0.274908
0
0
35
3.4
0
1
0
1.970023
1
0
39
3.9
0
0
0
1.05095
0
0
49
4.5
0
0
0
0.241819
1
0
61
4.7
0
0
0
1.349395
0
0
33
3.5
0
1
0
0.111564
0
0
58
3.7
0
1
0
-0.25773
0
0
56
4
0
1
0
-0.65627
1
0
50
4.1
0
0
0
-0.65639
0
0
52
4.4
0
1
0
0.724478
0
0
33
4.2
0
0
0
0.631834
0
0
57
4.5
0
1
0
1.070944
0
0
38
3.8
0
1
0
-1.45049
1
0
34
3.1
0
0
0
1.15588
0
0
34
3.7
0
0
0
-0.32601
1
0
32
3.9
0
1
0
0.884644
1
0
42
4
0
1
0
-0.55835
1
0
43
3.3
0
0
0
-0.34155
0
1
35
3.1
0
1
0
-0.50406
0
0
62
4
0
0
0
-0.90058
0
0
42
4.3
0
0
0
0.643014
0
0
39
3.7
0
1
0
0.773524
0
0
52
3.4
0
1
0
1.063938
0
0
52
4.3
0
1
0
-1.09039
0
0
52
3.7
0
0
0
-1.06916
0
0
64
4.2
0
0
0
1.415695
0
0
50
2.2
0
0
0
-1.42292
0
0
60
3
0
1
0
0.391822
0
0
51
4.3
0
0
0
-0.48996
1
0
43
4.6
1
0
1
-0.58359
1
0
50
3.5
0
0
0
0.756683
0
0
52
4.6
0
0
0
0.880819
1
0
51
3.7
0
0
0
-0.5665
1
0
38
3.8
0
1
0
0.339404
1
0
47
3.6
1
1
0
-0.15137
1
0
43
4.4
0
1
0
-1.025
1
0
38
4.1
0
0
0
-0.02524
1
0
43
4.3
0
0
0
-0.74679
0
0
57
4
0
1
0
0.988949
0
0
51
4.8
0
0
1
-0.53242
1
0
45
3.5
0
0
0
-0.76689
1
0
57
3.6
0
1
0
1.154256
1
0
47
3.8
1
1
0
1.232602
1
0
54
4.7
0
0
0
1.774334
1
0
58
4.9
0
0
0
1.773151
1
0
42
4.3
0
0
0
0.724593
1
0
33
3.3
0
0
0
-1.18163
1
0
62
3.4
1
1
0
1.769452
1
0
35
3.6
0
0
0
-0.58726
1
0
61
4
0
1
0
-0.00183
1
0
52
3.9
0
1
0
-0.05668
0
1
60
4.3
0
0
0
1.231394
1
0
32
3.3
1
1
0
0.4204
0
1
42
3.7
1
1
0
0.289916
0
0
36
3.6
1
1
0
0.289916
0
0
36
4.4
1
1
0
0.289916
0
0
36
4
0
0
0
-0.73773
0
0
59
2.1
0
0
0
-0.73773
0
0
59
3.2
0
0
0
-0.57198
0
0
51
3.5
0
1
0
-0.67796
0
0
40
4.1
0
1
0
-0.67796
0
0
40
4.6
0
1
0
-0.67796
0
0
40
3.8
0
1
0
-0.67796
0
0
40
3.8
0
1
0
-0.67796
0
0
40
3.8
0
1
0
-0.67796
0
0
40
4.2
0
1
0
-0.67796
0
0
40
3.9
0
1
0
1.509794
0
0
31
4.5
0
1
0
1.509794
0
0
31
4.5
0
1
0
1.509794
0
0
31
4.4
0
1
0
1.509794
0
0
31
4.4
0
1
0
1.509794
0
0
31
4.4
0
0
0
0.588569
0
0
62
4.5
0
0
0
0.588569
0
0
62
4.3
0
0
0
0.588569
0
0
62
4.6
0
0
0
0.588569
0
0
62
4.8
0
0
0
0.588569
0
0
62
4.3
0
0
0
0.588569
0
0
62
4
0
1
0
-0.126
0
0
33
4
0
1
0
-0.126
0
0
33
3.9
0
1
0
-0.126
0
0
33
3.3
0
1
0
-0.126
0
0
33
4.5
0
1
0
-0.25819
0
0
51
4.5
0
1
0
-0.25819
0
0
51
4.5
0
1
0
-0.25819
0
0
51
2.5
0
1
0
-0.25819
1
0
51
4.3
0
1
0
-0.25819
0
0
51
4.5
0
1
0
-0.25819
0
0
51
4.7
0
1
0
0.149693
0
0
33
3.5
0
1
0
0.149693
0
0
33
4.5
0
1
0
0.149693
0
0
33
3.8
0
1
0
0.149693
0
0
33
4.5
0
1
0
0.149693
0
0
33
4.3
0
1
0
0.149693
0
0
33
3.9
0
0
0
0.540917
0
0
47
4.3
0
0
0
0.540917
0
0
47
4.2
0
0
0
0.540917
0
0
47
5
0
0
0
0.540917
1
0
47
5
0
0
0
0.540917
1
0
47
4.6
0
0
0
0.540917
0
0
47
5
0
0
0
0.540917
1
0
47
4.7
0
0
0
0.540917
0
0
47
5
0
0
0
0.540917
1
0
47
2.7
1
0
0
0.231613
0
1
35
4
1
0
0
0.231613
0
1
35
4.4
0
0
0
-0.06667
0
0
37
4.4
0
0
0
-0.06667
0
0
37
4.3
0
0
0
-0.06667
0
0
37
3.5
0
0
0
-0.06667
0
0
37
3.8
0
0
0
0.216892
0
0
42
3.9
0
0
0
0.216892
0
0
42
3.7
0
0
0
0.216892
0
0
42
3.3
0
0
0
0.216892
0
0
42
4
0
0
0
0.216892
0
0
42
3.8
0
0
0
0.216892
0
0
42
4.2
0
0
0
-0.2587
0
1
49
3.1
0
0
0
-0.2587
0
1
49
3.6
0
0
0
-0.2587
0
1
49
3.3
0
1
0
0.550288
0
0
37
2.9
0
1
0
0.550288
0
0
37
3.1
0
1
0
0.550288
0
0
37
4
0
0
0
-0.06204
1
0
45
4
0
0
0
-0.06204
1
0
45
4.2
0
0
0
-0.06204
0
0
45
3.8
0
0
0
-0.06204
0
0
45
4.3
0
0
0
-0.06204
1
0
45
4.6
0
1
0
-0.98239
0
0
56
4.3
0
1
0
-0.98239
0
0
56
3.6
0
1
0
-0.98239
0
0
56
4.2
0
1
0
-0.98239
0
0
56
3.9
0
0
0
-0.05434
0
0
48
4.1
0
0
0
-0.05434
0
0
48
4
0
0
0
-0.05434
1
0
48
4.3
0
0
0
-0.05434
1
0
48
3.9
0
0
0
-0.05434
0
0
48
4.2
0
0
0
-0.05434
1
0
48
4.2
0
0
0
-0.05434
1
0
48
4.9
0
1
0
-0.06801
1
0
46
4
0
1
0
-0.06801
0
0
46
4.3
0
1
0
-0.06801
0
0
46
4.9
0
1
0
-0.06801
0
0
46
3.9
0
1
0
-0.06801
0
0
46
4.9
0
1
0
-0.06801
1
0
46
3.9
0
1
0
-0.06801
0
0
46
4
0
1
0
-0.06801
1
0
46
3.5
0
1
0
0.029414
0
0
57
3.9
0
1
0
0.029414
0
0
57
4
0
1
0
0.029414
0
0
57
3.6
0
1
0
0.029414
0
0
57
3
0
1
0
0.029414
0
0
57
3
0
1
0
0.029414
0
0
57
3.6
0
1
0
0.029414
0
0
57
3.6
0
1
0
0.029414
0
0
57
3.2
0
1
0
0.029414
0
0
57
3.9
0
1
0
0.239486
0
0
52
3.5
0
1
0
0.239486
0
0
52
3.5
0
1
0
0.239486
0
0
52
3.1
0
1
1
0.239486
0
0
52
4.2
0
1
0
0.239486
0
0
52
3.6
0
0
0
-0.73309
1
0
62
4.5
0
0
0
-0.73309
0
0
62
3.7
0
0
0
-0.73309
1
0
62
3.4
0
0
0
-0.73309
1
0
62
4.5
0
0
0
-0.11112
0
0
64
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