A district wishes to study the relationship between class size (x), and achievement test scores (y). A sample of 15 classrooms from the school district is given in the table below. Class Size, x Score, y x2 y2 ху 15 85 17 86 18 84 20 82 21 80 24 78 26 75 29 71 10 92 12 88 30 68 25 76 16 88 14 89 19 82 a) Draw a scatter plot. Label all axes. b) Does the scatter plot suggest a linear correlation between class size (x), and achievement test scores (y)? If yes, what type of linear correlation exists? Why? c) Fill in the table above.

MATLAB: An Introduction with Applications
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A district wishes to study the relationship between class size (x), and achievement test scores (y). A
sample of 15 classrooms from the school district is given in the table below.
Class Size, x
Score, y
x2
y2
ху
15
85
17
86
18
84
20
82
21
80
24
78
26
75
29
71
10
92
12
88
30
68
25
76
16
88
14
89
19
82
a) Draw a scatter plot. Label all axes.
b) Does the scatter plot suggest a linear correlation between class size (x), and achievement test
scores (y)? If yes, what type of linear correlation exists? Why?
c) Fill in the table above.
Transcribed Image Text:A district wishes to study the relationship between class size (x), and achievement test scores (y). A sample of 15 classrooms from the school district is given in the table below. Class Size, x Score, y x2 y2 ху 15 85 17 86 18 84 20 82 21 80 24 78 26 75 29 71 10 92 12 88 30 68 25 76 16 88 14 89 19 82 a) Draw a scatter plot. Label all axes. b) Does the scatter plot suggest a linear correlation between class size (x), and achievement test scores (y)? If yes, what type of linear correlation exists? Why? c) Fill in the table above.
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