Question
In: Statistics and Probability
Absences Grade (Marks) 0 89.2 1 86.4 2 83.5 3 81.1 4 78.2 5 73.9 6...
| Absences | Grade (Marks) |
| 0 | 89.2 |
| 1 | 86.4 |
| 2 | 83.5 |
| 3 | 81.1 |
| 4 | 78.2 |
| 5 | 73.9 |
| 6 | 64.3 |
| 7 | 71.7 |
| 8 | 65.5 |
| 9 | 66.2 |
| 5 | 72.4 |
| 6 | 67.5 |
| 1 | 85 |
| 1 | 86.9 |
| 1 | 83.7 |
| 2 | 82.7 |
| 3 | 81 |
| 3 | 80.9 |
| 2 | 83 |
| 2 | 82.2 |
| 3 | 81 |
| 4 | 77.6 |
| 5 | 72.9 |
| 6 | 61.2 |
| 7 | 66.9 |
| 5 | 70.8 |
| 9 | 65.2 |
| 8 | 55.9 |
| 5 | 71.8 |
| 2 | 85.5 |
An Economics professor is trying to investigate the relationship between the number of times students were absent during the semester and their numerical grades. The data represents the grades of 30 randomly selected students from his economics class along with the number of times they were absent.
Using Excel make a scatterplot.
Does it appear to be a positive or negative relationship?
Explain your answer.
What are the independent and dependent variables?
Independent Variable:
Dependent Variable:
Solutions
Expert Solution
Answer:-
From the above information
We draw scatter plot by using EXCEL
Conclusion :- from the above scatter plot we observe that there is a negative relationship between absences and grade.
Here , dependent variable = Grade.
Independent variable = Absences .
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orchestra answered 2 years agoRelated Solutions
Student # Grade (Marks) 1 89.2 2 86.4 3 83.5 4 81.1 5 78.2 6 73.9...
Student #
Grade (Marks)
1
89.2
2
86.4
3
83.5
4
81.1
5
78.2
6
73.9
BINS
7
64.3
60
8
71.7
70
9
65.5
80
10
66.2
90
11
72.4
100
12
67.5
13
85
14
86.9
15
83.7
16
82.7
17
81
18
80.9
19
83
20
82.2
21
81
22
77.6
23
72.9
24
61.2
25
66.9
26
70.8
27
65.2
28
55.9
29
71.8
30
85.5
An Economics professor is trying to investigate the distribution
of...
exampleInput.txt 1 2 3 0 2 3 4 0 1 3 5 0 1 2 6...
exampleInput.txt
1 2 3
0 2 3 4
0 1 3 5
0 1 2 6
1 5 6 8
2 4 6 7
3 4 5 9 10
5 8 9
4 7 9
6 7 8
6
How can I detect when 'cin' starts reading from a new line. The
amount of numbers in each row is unknown. I need them in type 'int'
to use the data.
x (Bins) frequency 0 0 1 0 2 0 3 2 4 5 5 8 6...
x (Bins)
frequency
0
0
1
0
2
0
3
2
4
5
5
8
6
13
7
33
8
42
9
66
10
77
11
105
12
103
13
110
14
105
15
84
16
70
17
51
18
40
19
27
20
27
21
15
22
5
23
7
24
2
25
2
26
1
27
0
28
0
29
0
30
0
(7) On the Histogram worksheet, calculate all
frequencies of the distribution using the table shown....
6 5 4 5 0 0 13 48 6 1 0 7 2 0 1 1...
6
5
4
5
0
0
13
48
6
1
0
7
2
0
1
1
0
2
11
5
11
27
4
0
6
Create Standard Deviation Chart (Normal Distribution
Curve)
Section 1 Section 2 Section 3 82.5 68.1 71.1 73.9 83.8 77.4 78.8 71.9 78.2 71.9...
Section 1
Section 2
Section 3
82.5
68.1
71.1
73.9
83.8
77.4
78.8
71.9
78.2
71.9
45.1
84.8
84.5
69.1
82.3
70.8
61.8
78.8
65.8
87.4
75.6
88.2
47.7
74.3
79.7
60.9
69.1
Run a one-factor ANOVA (fixed effect) with α=0.05 Report the
F-ratio to 3 decimal places and the P-value to 4
decimal places.
F=3.787976
p=0.0371755
What is the conclusion from the ANOVA?
reject the null hypothesis: at least one of the group means is
different
fail to reject...
ID X Y 1 2 3 2 3 6 3 4 6 4 5 7 5...
ID
X
Y
1
2
3
2
3
6
3
4
6
4
5
7
5
8
7
6
5
7
7
6
7
8
8
8
9
7
8
10
12
11
Test the significance of the correlation coefficient.
Then use math test scores (X) to predict physics test scores
(Y). Do the following:
Create a scatterplot of X and Y.
Write the regression equation and interpret the regression
coefficients (i.e., intercept and slope).
Predict the physics score for each....
[4 5 5 2 4 4 6 3 3 7 5 3 6 3 4 4...
[4 5 5 2 4 4 6 3 3 7 5 3 6 3 4 4 6 5 4 5 3 7 5 5 4 2 6 5 6
6]
This is my dataset
Find mean, median, mode, variance, standard deviation,
coefficient of variation, range, 70th percentile,
3rdquartile of the data and skewness and define what
each of these statistics measure. For example, mean is a measure of
the central tendency, what about the rest?
Use Chebyshev’s rule to find...
[4 5 5 2 4 4 6 3 3 7 5 3 6 3 4 4...
[4 5 5 2 4 4 6 3 3 7 5 3 6 3 4 4 6 5 4 5 3 7 5 5 4 2 6 5 6
6]
This is my dataset
Split the dataset in two equal parts. You have 30 datavalues.
If you split the data in two equal parts each part will contain 15
data values. Call the first part Y and second part
X.Draw scatter plot of the 2 datasets, X being on the horizontal...
0 0 2 0 5 3 1 12 0 0 0 1 6 0 1 1...
0
0
2
0
5
3
1
12
0
0
0
1
6
0
1
1
2
8
1
3
1
6
2
4
0
16
17
0
8
0
3
0
0
1
2
5
2
0
2
1
5
0
7
0
1
0
0
1
0
0
3
1
9
4
1
3
0
1
1
1
0
7
1
9
2
0
1
1
1
1
7
2
7
1
2
===============================
(a) What type of...
tens Units 1 5 2 3 4 8 5 2 5 6 9 6 1 3...
tens
Units
1
5
2
3
4
8
5
2 5 6 9
6
1 3 5 4 7 9
7
0 0 4 5 6 9 9
8
1 3 5 6 8 9
9
0 1 2 3 5 9
The table represent a random sample of 31 test scores taken from
a large lecture class. Find the following [round to 2 decimal
points X. XX]
a) [2 pts] Find the 5 number summary [L, Q1, Q2, Q3,...
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