Question
In: Statistics and Probability
A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their...
A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their competition scores were recorded before and after the training. The results are shown below. Use a 0.01 significance level to test the claim that the training technique is effective in rising the gymnasts’ scores.
|
Subject |
A |
B |
C |
D |
E |
F |
G |
|
Before |
9.6 |
9.7 |
9.7 |
9.1 |
9.7 |
9.2 |
9.1 |
|
After |
9.7 |
9.9 |
9.7 |
9.3 |
9.8 |
9.8 |
9.3 |
Solutions
Expert Solution
(5) Conclusion
It is concluded that the null hypothesis Ho is not rejected. Therefore, there is not enough evidence to claim that the the training technique is effective in rising the gymnasts’ scores, at the 0.01 significance level.
orchestra answered 1 year agoRelated Solutions
A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their...
A coach uses a new technique to train gymnasts. 7
gymnasts were randomly selected and their competition scores were
recorded before and after the training. The results are shown
below
Subject A B
C D E F
G
Before 9.6 9.7 9.7 9.4 9.7 9.5 9.5
After 9.7 9.9 9.7 9.3 9.8 9.8
9.3
Using a 0.01 level of significance, test the claim that the
training technique is effective in raising the gymnasts’...
A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected and their...
A coach uses a new technique to train gymnasts. 7 gymnasts were
randomly selected and their competition scores were recorded before
and after the training. The results are shown below
Subject
A
B
C
D
E
F
G
Before
9.6
9.7
9.7
9.4
9.7
9.5
9.5
After
9.7
9.9
9.7
9.3
9.8
9.8
9.3
Using a 0.01 level of significance,
test the claim that the training technique is effective in raising
the gymnasts’ score.
Use the traditional method of
hypothesis...
Question #4 A coach uses a new technique to train gymnasts. 7 gymnasts were randomly selected...
Question #4
A coach uses a new technique to train gymnasts. 7 gymnasts were
randomly selected and their competition scores were recorded before
and after the training. The results are shown below.
Before
9.4
9.0
9.2
9.4
9.2
9.3
9.7
After
9.5
9.3
9.5
9.6
9.4
9.5
9.9
Using a 0.10 level of significance and Critical Value method to
test the claim that the training technique is effective in raising
the gymnasts' scores. (Mean difference is less than zero)
A coach uses a new technique in training middle distance runners. The times for 9 randomly...
A coach uses a new technique in training middle distance
runners. The times for 9 randomly selected, independent athletes to
run 800 meters before and after this training are shown below.
Assume the distribution of differences are normally distributed
Before 115.2 120.9 108.0 112.4 107.5 119.1 121.3 110.8 122.3
After 116.0 119.1 105.1 111.9 109.1 115.1 118.5 110.7 120.9
Build and Interpret 90% confidence interval for the true mean
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A coach times 6 randomly selected runners to measure their times early in the week and...
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early in the week and at the end of the week (in minutes). Using
the parts below, help the coach run a paired t-test to determine if
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Use α = 0.05.
Runner
Monday time
Fridays time
1
26.2
25.8
2
25.2
24.9
3
24.8
24.9
4
24.1
24.6
5
25.9
25.2
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25.1
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