Question
In: Statistics and Probability
20. A student is interested in studying the impact of the number of books students referred...
20. A student is interested in studying the impact of the number of books students referred to in a statistics course and the number of lectures they attended on the final grade on the course. A sample of 25 students is selected and the data are given below.
|
BOOKS |
ATTEND |
GRADE |
|
2 |
17 |
60 |
|
3 |
18 |
54 |
|
1 |
17 |
62 |
|
5 |
20 |
59 |
|
2 |
12 |
44 |
|
1 |
13 |
40 |
|
3 |
17 |
96 |
|
4 |
19 |
90 |
|
5 |
22 |
97 |
|
2 |
22 |
54 |
|
5 |
22 |
91 |
|
1 |
12 |
48 |
|
3 |
18 |
91 |
|
1 |
12 |
65 |
|
4 |
21 |
82 |
|
5 |
14 |
61 |
|
3 |
18 |
54 |
|
3 |
13 |
46 |
|
1 |
8 |
64 |
|
5 |
22 |
90 |
Use the F test to determine the overall significance of the relationship. What is your conclusion at the 0.05 level of significance? Use the t test to determine the significance of each independent variable? What are your conclusions at the 0.05 level of significance?
Solutions
orchestra answered 2 years agoRelated Solutions
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The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test is represented in the table below.
Hours spent studying, x
0
2
4
5
5
5
6
7
8
9
Test scores, y
40
51
64
69
73
75
93
90
95
95
7) What amount of the variance in test score (y) do the hours
spent studying (x) account for this sample? (r2 =?) Interpret the
result in the context of the...
The number of hours 1010 students spent studying for a test and their scores on that...
The number of hours
1010
students spent studying for a test and their scores on that test
are shown in the table. Is there enough evidence to conclude that
there is a significant linear correlation between the data?
Use
alphaαequals=0.050.05.
Hours, x
00
11
22
44
44
55
55
66
77
88
Test score, y
4141
4040
5555
5656
6464
6666
7575
7878
8181
9797
LOADING...
Click here to view a table of critical values for Student's
t-distribution.
Setup...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test are shown in the table. Is there enough
evidence to conclude that there is a significant linear correlation
between the data? Use alphaequals0.05.
Hours, x= 0 1 2 4 4 5 5 6 7 8 Test score, y= 41 40 51 56 65 70
76 70 84 97
1. Setup the hypothesis for the test.
2. Identify the critical value(s). Select the correct...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test is represented in the table below.
Hours spent studying, x
0
2
4
5
5
5
6
7
8
9
Test scores, y
40
51
64
69
73
75
93
90
95
95
3) Describe the type of correlation and interpret the
correlation in the context of the data. Be specific in describing
the magnitude, direction, and strength of the relationship.
(12p)
4)...
The number of hours 10 students spent studying for a test and their scores on that...
The number of hours 10 students spent studying for a test and
their scores on that test are shown in the table. Is there enough
evidence to conclude that there is a significant linear correlation
between the data? Use alphaαequals= .01
X(hours) = top row; Y(score)=bottom row
0
1
2
3
4
4
5
6
7
8
41
46
52
50
65
68
75
85
82
91
Set up hypothesis test = ??
Critical Values = ??
Calculate test statistic;...
You are interested in the time students usually spend studying for the final exams. Assume that...
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What standard deviation of x do you need such that the margin
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