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Q1) 4 research participants take test of manual dexterity (high scores mean better dexterity) and the anxiety test (high scores mean more anxiety). Scores are as follows:
Person
Dexterity
Anxiety
1
10
2
8
3
4
-2
a) Create a scatter diagram of scores
b) Explain in words general pattern of correlation is statistically important.
Q2) In recent seasons, Major League Baseball has been criticized for length of the games. A report pointed out that average game lasts 3 hours and 30 minutes. Sample of 17 games disclosed following times to completion. (Note that minutes have been changed to fractions of hours, so that game that lasted 2 hours and 24 minutes is reported at 2.40 hours
Sl. No.
5
6
7
9
11
12
13
14
15
16
17
Time (x)
2.98
2.4
2.7
2.25
3.23
3.17
2.93
3.18
2.8
2.38
3.75
3.2
3.27
2.52
2.58
4.45
2.45
Can we conclude that mean time for game is less than 3.50 hours? Use.05 significance level.
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