A study was done to test the effectiveness of a juggling class. Before the class started, six subjects juggled as many as they could at once. After the class, the same six subjects juggled as many balls as they could. The differences in the number of all balls are calculated. Assume the differences have a normal distribution. Subject A B C D E F Before 3 4 3 2 4 5 After 4 5 6 4 5 7 Before-After 6. This is a test of: Group of answer choices Two means, population standard deviation unknown. Two means, population standard deviation known. Matched pairs Two proportions 7. The random variable to use is Group of answer choices Xbard: The difference in the number of balls juggled before and after the class. Xbard: The average difference in the number of balls juggled before and after the class. Xbar1-Xbar2: The difference in the average number of balls juggled before and after the class. Xbar1-Xbar2:The difference in the number of balls juggled by the before and after the class. 8. Which distribution do you use for this test. N( 0 , 1) t6 C. D. Group of answer choices student-t with df=5 student-t with df=6 N(0,1)
Exercises 6 - 9 refer to the following
A study was done to test the effectiveness of a juggling class. Before the class started, six subjects juggled as many as they could at once. After the class, the same six subjects juggled as many balls as they could. The differences in the number of all balls are calculated. Assume the differences have a
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Subject |
A |
B |
C |
D |
E |
F |
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Before |
3 |
4 |
3 |
2 |
4 |
5 |
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After |
4 |
5 |
6 |
4 |
5 |
7 |
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Before-After |
6. This is a test of:
Group of answer choices
Two means, population standard deviation unknown.
Two means, population standard deviation known.
Matched pairs
Two proportions
7. The random variable to use is
Group of answer choices
Xbard: The difference in the number of balls juggled before and after the class.
Xbard: The average difference in the number of balls juggled before and after the class.
Xbar1-Xbar2: The difference in the average number of balls juggled before and after the class.
Xbar1-Xbar2:The difference in the number of balls juggled by the before and after the class.
8. Which distribution do you use for this test.
- N( 0 , 1) t6 C. D.
Group of answer choices
student-t with df=5
student-t with df=6
N(0,1)
unable to determine.
9. The conclusion to the test is.
Group of answer choices
Because we reject the null hypothesis so the class is effective in improving the juggling skills.
Because we do not reject the null hypothesis so the class is not effective in improving the juggling skills.
Because we reject the null hypothesis so the class is not effective in improving the juggling skills.
Because we do not reject the null hypothesis so the class is effective in improving the juggling skills
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