What is the value of r? a) 0.8620 b) -0.8620 c) 0.9236 d) -0.927 e) 0.927 f) -0.9236

MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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A statistic teacher recorded the Math and Science test scores of twelve students from one section. Using 0.05 as the level of significance, is there a significant relationship between the test scores in Mathematics and Science?

Student number Math Scores (X)   Science Scores (Y)
1 18 20
2 16 18
3 11 12
4 15 17
5 15 15
6 11 14
7 11 12
8 13 14
9 8 10
10 9 13
11 13 12
12 7 9

What is the value of r?

a) 0.8620

b) -0.8620

c) 0.9236

d) -0.927

e) 0.927

f) -0.9236

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