Question
In: Statistics and Probability
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were...
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were measured for 20 students in a beginning computer-science course. The results were as follows.
| x | 5 | 15 | 21 | 12 | 23 | 22 | 14 | 21 | 20 | 15 | 17 | 16 | 9 | 7 | 4 | 21 | 17 | 10 | 18 | 15 |
| y | 19 | 19 | 24 | 36 | 27 | 26 | 25 | 28 | 17 | 27 | 21 | 24 | 18 | 18 | 14 | 28 | 21 | 22 | 20 | 21 |
(a) Find the equation of the line of best fit. (Round your slope
to four decimal places and your y-intercept to three
decimal places.)
= + x
(b) Find se2. (Round your answer to
two decimal places.)
Solutions
Expert Solution
The statistical software output for this problem is :
(a)
y hat = 16.745 + 0.3977 x
(b)
S2e = 21.540
orchestra answered 1 year agoRelated Solutions
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were...
The computer-science aptitude score, x, and the
achievement score, y (measured by a comprehensive final),
were measured for 20 students in a beginning computer-science
course. The results were as follows.
x
5
15
21
12
23
22
16
19
20
17
17
16
7
7
4
21
17
10
18
15
y
19
19
24
36
27
26
25
28
17
27
21
24
18
18
14
28
21
22
20
21
(a) Find the equation of the line of...
The computer-science aptitude score, x, and the achievement score, y (measured by a comprehensive final), were...
The computer-science aptitude score, x, and the
achievement score, y (measured by a comprehensive final),
were measured for 20 students in a beginning computer-science
course. The results were as follows.
x
5
15
19
12
23
20
14
21
18
15
17
16
9
5
6
19
19
10
20
13
y
19
19
24
36
27
26
25
28
17
27
21
24
18
18
14
28
21
22
20
21
(a) Find the equation of the line of...
Number of absences (x) Final exam score (Y) 0
Number of absences (x) Final exam score (Y)
0
89.4
1
87.2
2
84.5
3
81.7
4
77.3
5
74.8
6
63.7
7
72.1
8
66.4
9
65.8
Critical Values for Correlation Coefficient
n
3 0.997
4 0.950
5 0.878
6 0.811
7 0.754
8 0.707
9 0.666
10 0.632
11 0.602
12 0.576
13 0.553
14 0.532
15 0.514
16 0.497
17 0.482
18 0.468
19 0.456
20 0.444
21 0.433
22 0.423
23 0.413
24 0.404
25 0.396
26 ...
The accompanying data represent the number of days absent, x, and the final exam score, y,...
The accompanying
data represent the number of days absent, x, and the final exam
score, y, for a sample of college students in a general education
course at a large state university. Complete parts (a) through (e)
below.
Click
the icon to view the absence count and final exam score
data.
Absences and Final
Exam Scores
No. of
absences, x
0
1
2
3
4
5
6
7
8
9
Final
exam
score,
y
88.3
87.3
84.2
80.9
77.6
73.8...
The age x and resting heart rate y were measured for ten men, with the results...
The age x and resting heart rate
y were measured for ten men, with the
results shown in the table.
x
20
23
30
37
35
45
51
55
60
63
y
72
71
73
74
74
73
72
79
75
77
Test, at 10% level of significance, whether age is useful for
predicting resting heart rate.
H0:
Ha:
t-Test Statistic (round to three decimal
places) =
Critical t-score (t αt α or t α / 2t α / 2,...
Test A Score Respondent X Y &n
Test
A Score
Respondent X Y x-x (
x-x)
2
y-y (
y-y) 2 ( x-x) (
y-y)
Jones
77
51
24.8
615.04
7.8
60.84
193.44
Dunn
66
59
13.8
190.44
15.8
249.64
218.04
Dean
41
44
-11.2
125.44
0.8
0.64
-8.96
Hampton
47
34
-5.2
27.04
-9.2
84.64
47.84
Nichols
32
28
-22.2
492.84
-15.2
231.04
337.44
Test
B Score
Respondent X Y x-x (
x-x)
2
y-y (
y-y) 2 ( x-x) (
y-y)
Jones
50
51
-3.4
11.56
7.4
54.76
-25.16
Dunn
38
69
-15.4
237.16
25.40
645.16
-391.16
Dean
58...
As part of a recent? survey, self-reported? heights, x, and measured? heights, y, were obtained for...
As part of a recent? survey, self-reported? heights, x, and
measured? heights, y, were obtained for males aged 12?16. Use the
Wilcoxon? signed-ranks test to test the claim that the matched
pairs have differences that come from a population with median
equal to zero at a significance level of alpha equals 0.1. Find the
null and alternate hypothesis, test statistic, critival value and
state the conclusion.
x
y
67
68.6
61
63
68
61.1
67
61
64
67.7
64
68.3...
The following data on x = score on a measure of test anxiety and y =...
The following data on x = score on a measure of test
anxiety and y = exam score for a sample of n = 9
students are consistent with summary quantities given in a paper.
Higher values for x indicate higher levels of anxiety.
Compute the value of the correlation coefficient. (Give the answer
to four decimal places.)
r = ________
x
23
13
15
0
17
21
19
14
20
y
44
59
49
76
49
51
46
52...
The values given below shows the aptitude test scores, x, and the intelligence quotient (IQ), y,...
The values given below shows the aptitude test scores,
x, and the intelligence quotient (IQ), y, for 9 people.
x : 68, 72, 65, 70, 62, 75, 78, 64, 69
y : 90, 85, 88, 100, 105, 98, 70, 65, 72
Resolve problem and find the correlation coefficient
using Spearman Rank Correlation. Interpret the result accordingly.
(15 pts)
FINAL COMPREHENSIVE TEST The following financial statements were prepared on December 31, 2019: &n
FINAL COMPREHENSIVE TEST
The following financial statements were prepared on December 31,
2019:
Post Inc.
Stamp
Inc.
Cash
$
85,000
$
45,000
Inventory
225,000
55,000
Property, plant &
equipment
405,000
595,000
Investment in Stamp Inc. – at
cost
800,000
-
Total
Assets
$1,515,000
$
695,000
Current
Liabilities
$
68,000
$
91,000
Common
Shares
875,000
310,500
Retained
Earnings
572,000 ...
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