The data from data349.dat contains information on 78 seventh-grade students. We want to know how well each of IQ score and self-concept score predicts GPA using least-squares regression. We also want to know which of these explanatory variables predicts GPA better. Give numerical measures that answer these questions. (Round your answers to three decimal places.) (Regressor: IQ) R 2 (Regressor: Self-Concept) R 2 Which variable is the better predictor? IQ
Self Concept
obs gpa iq
gender concept
1 7.94 112 2
50
2 8.292 101 2
44
3 4.643 95 2
46
4 7.47 102 2
51
5 8.882 94 1
60
6 7.585 108 2
61
7 7.65 106 2
51
8 2.412 79 2
47
9 6 117 1 64
10 8.833 113 2
34
11 7.47 104 1
57
12 5.528 105 1
44
13 7.167 90 2
45
14 7.571 98 1
61
15 4.7 121 1
48
16 8.167 114 1
70
17 7.822 114 1
64
18 7.598 117 1
63
19 4 105 2 44
20 6.231 113 1
34
21 7.643 113 2
62
22 1.76 94 2
18
24 6.419 103 1
49
26 9.648 111 2
70
27 10.7 137 1
72
28 10.58 125 2
41
29 9.429 110 2
77
30 8 101 2 58
31 9.585 124 2
72
32 9.571 133 1
58
33 8.998 109 1
49
34 8.333 110 1
50
35 8.175 108 2
29
36 8 105 2 82
37 9.333 124 1
42
38 9.5 84 2
72
39 9.167 119 2
55
40 10.14 101 1
62
41 9.999 107 1
53
43 10.76 119 2
73
44 9.763 134 2
65
45 9.41 123 2
62
46 9.167 125 2
89
47 9.348 101 2
82
48 8.167 97 2
67
50 3.647 102 2
54
51 3.408 77 1
31
52 3.936 98 2
56
53 7.167 101 2
38
54 7.647 103 2
70
55 .53 73 2
35
56 6.173 101 2
34
57 7.295 104 2
54
58 7.295 122 1
58
59 8.938 110 1
83
60 7.882 106 1
48
61 8.353 118 2
58
62 5.062 99 2
48
63 8.175 112 2
35
64 8.235 100 2
67
65 7.588 102 2
57
68 7.647 94 2
62
69 5.237 97 1
44
71 7.825 119 2
61
72 7.333 116 1
54
74 9.167 126 2
44
76 7.996 105 2
53
77 8.714 116 1
48
78 7.833 105 1
45
79 4.885 90 2
55
80 7.998 118 1
60
83 3.82 104 2
22
84 5.936 107 1
52
85 9 121 1 59
86 9.5 102 1
75
87 6.057 89 2
46
88 6.057 113 1
44
89 6.938 111 2
58
The data from data349.dat contains information on 78 seventh-grade students. We want to know how well each of IQ score a...
The data from data421.dat contains information on 78 seventh-grade students. We want to know how well each of IQ score and self-concept score predicts GPA using least-squares regression. We also want to know which of these explanatory variables predicts GPA better. Give numerical measures that answer these questions. (Round your answers to three decimal places.) find:(Regressor: IQ) R 2 find: (Regressor: Self-Concept) R 2 obs gpa iq gender concept 1 7.94 103 2 54 2 8.292 111 2 73 3...
The data from data95.dat contains information on 78 seventh-grade students. We want to know how well each of IQ score and self-concept score predicts GPA using least-squares regression. We also want to know which of these explanatory variables predicts GPA better. Give numerical measures that answer these questions. (Round your answers to three decimal places.) (Regressor: IQ) R 2 : (Regressor: Self-Concept) R 2 : Which variable is the better predictor? IQSelf Concept obs gpa iq gender concept 1 7.94...
Make a graph of the distribution of IQ scores for the seventh-grade students in table 1.3. Describe the shape, center, and spread of the distribution as well as any outliers. IQ scores are usually said to be centered at 100. Is the midpoint for these students close to 100, clearly above, or clearly below? TABLE 1.3 Educational Data for 78 Seventh-Grade Self- OBS Gender concept 123 GPA 8.292 4.643 7.470 8.882 7.585 10.760 9.763 9.410 9.167 9.348 8.167 107 046...
1.40 Describe the IQ scores. Make a graph of the distribution of IQ scores for the seventh-grade students in Table 1.3. Describe the shape, center, and spread of the 26 Chapter 1 Looking at Data-Distributions TABLE 1.3 Educational Data for 78 Seventh-Grade Sltudents Educational Data for 78 Seventh-Grade Students OBS GPA 1O Gender concept I0 Genderconcept 7.940 8.292 4.643 7.470 8.882 7.585 7.650 2.412 6.000 10.760 9.763 003 9410 126 9.167 9.348 127 047 51 8.167 3.647 3.408 3.936 119...
Problem 4: Variables that may affect Grades The data set contains a random sample of STAT 250 Final Exam Scores out of 80 points. For each individual sampled, the time (in hours per week) that the student spent participating in a GMU club or sport and working for pay outside of GMU was recorded. Values of 0 indicate the students either does not participate in a club or sport or does not work a job for pay. The goal of...
Gender Selfconce ID GPA 7.940111 8.292107 4.643 100 7.470107 67 2 4 3 52 8.882 114 7.585 115 7.650111 58 71 51 2.412 97 6.000 100 8.833 112 4 9 51 7.470 104 35 5.528 89 54 13 7.167104 54 64 56 69 7.571 102 4.700 91 8.167114 15 17 7.822 114 65 7.598 103 4.000 106 19 40 6.231 105 21 7.643 113 1.760 109 20 24 6.419 108 56 68 69 9.648 113 2 27 10.700 130 28...
Problem 1: Confidence Interval for Percentage of B’s. The data set “STAT 250 Final Exam Scores” contains a random sample of 269 STAT 250 students’ final exam scores (maximum of 80) collected over the past two years. Answer the following questions using this data set. a) What proportion of students in our sample earned B’s on the final exam? A letter grade of B is obtained with a score of between 64 and 71 inclusive. Hint: You can do this...
1. Forecast demand for Year 4. a. Explain what technique you utilized to forecast your demand. b. Explain why you chose this technique over others. Year 3 Year 1 Year 2 Actual Actual Actual Forecast Forecast Forecast Demand Demand Demand Week 1 52 57 63 55 66 77 Week 2 49 58 68 69 75 65 Week 3 47 50 58 65 80 74 Week 4 60 53 58 55 78 67 57 Week 5 49 57 64 76 77...
6. Suppose r0-0x8000, and the memory layout is as follows: Address Data 0x8007 0x8006 0x8005 0x8004 0x8003 0x8002 0x8001 0x8000 0x79 0xCD 0xA3 0xFD 0xOD 0xEB 0x2C 0x1A Suppose the system is set as little endian. What are the values of rl and r0 if the instructions are executed separately? (a) LDR (b) LDR (c) LDR (d) LDR rl, r1, r1, r1, [re] [r0, #41 [r0], #4 [r0, #41 ! r1 - r1 - r0 - Appendix 1: ASCII Table...
The subjects in the data are college students. In the data, id is student ID, anxiety is student’s anxiety score via Anxiety Scale, selfest is student’s self-esteem score via Rosenberg Self-esteem Scale, GPA is student’s GPA; for gender, 0=female, 1=male; for grade, 1=freshman, 2=junior, 3=senior. We have known that population mean for Anxiety Scale is μ=60 with σ=10. Raise relevant questions ( 2 questions is fine) about the data extensively, the questions can be either about descriptive analysis or inferential...