How to use Rstudio to show my work? On an international? exam, students are aske
ID: 3368870 • Letter: H
Question
How to use Rstudio to show my work?
On an international? exam, students are asked to respond to a variety of background questions. For the 41 nations that participated in the? exam, the correlation between the percentage of items answered in the background questionnaire? (used as a proxy for student task? persistence) and mean score on the exam was
0.7760.776.
Does this suggest there is a linear relation between student task persistence and achievement? score? Write a sentence that explains what this result might mean.
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Click the icon to view the critical values table.
Does this suggest there is a linear relation between student task persistence and achievement? score? Choose the best response below.
A.
?No, since
StartAbsoluteValue 0.776 EndAbsoluteValue0.776
is less than the critical value for 30.
B.
?Yes, since
StartAbsoluteValue 0.776 EndAbsoluteValue0.776
is less than the critical value for 30.
C.
?No, since
StartAbsoluteValue 0.776 EndAbsoluteValue0.776
is greater than the critical value for 30.
D.
?Yes, since
StartAbsoluteValue 0.776 EndAbsoluteValue0.776
is greater than the critical value for 30.Your answer is correct.
What does this result? mean?
A.
There is no linear relation between countries in which students answered a greater percentage of items in the background questionnaire and higher mean scores on the exam.
B.
Countries in which students cheated on the exam also cheated on the items in the background questionnaire.
C.
Countries in which students answered a lesser percentage of items in the background questionnaire tended to have higher mean scores on the exam.
D.
Countries in which students answered a greater percentage of items in the background questionnaire tended to have higher mean scores on the exam.
Your answer is correct.
Question is complete.
Data Table
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
0.388
27
0.381
28
0.374
29
0.367
30
0.361
Explanation / Answer
a) You can see that, the correlation coefficient critical value for n= 30 is 0.361. We get the correlation coefficient of 0.822(as shown in the image) which is pretty strong to infer linear relationship between two variables in question.
b) Thus, Countries in which students answered a greater percentage of items in the background questionnaire tended to have higher mean scores on the exam.
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