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A teacher tests whether listening to music affects concentration. 10 students perform a concentration task twice: once in silence and once while listening to music. The scores (out of 20) are:
Student
1
2
3
4
5
6
7
8
9
10
Silence
15
18
12
14
19
16
10
13
17
15
Music
14
16
13
11
18
14
9
12
15
14
Test at the \(5\pourcent\) significance level whether scores are
lower
when listening to music.
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