Paired t-test 9. A doctor wants to test if a new "love potion" increases the number of dates over the course of a year. She chooses ten subjects, counts the number of dates over a year, and then gives them the "love potion" for the next year. The data is as follows: Before 12 13 5 0 11 2 6 18 20 After 17 9 25 7 0 14 8 2 10 Difference5 12 2 0 3 6 -4 -8 1 (A - B) Can she say that the potion works? (Use a = .10) Ho: mu d = 0 Ha: mu d>0 21

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Paired t-test
9. A doctor wants to test if a new "love potion" increases the number of dates over the course
of a year. She chooses ten subjects, counts the number of dates over a year, and then
gives them the "love potion" for the next year. The data is as follows:
Before
12
8.
13
11
2
6.
After
18
20
17
9.
25
14
8
2
10
21
Difference
12
2
(A - B)
-4
-8
1
Can she say that the potion works? (Use a = .10)
Ho: mu d = 0
Ha: mu d > 0
10. Eleven sets of fraternal twins are tracked to see the number of years of education. The
results are as follows:
12
14
11
20
16
13
12
19
9.
Sister
14
17
14
17
16
14
19
11
18
16
17
12
Brother
Is there a significant difference in the years of education between a fraternal brother and
sister? (a = .10)
417
Transcribed Image Text:Paired t-test 9. A doctor wants to test if a new "love potion" increases the number of dates over the course of a year. She chooses ten subjects, counts the number of dates over a year, and then gives them the "love potion" for the next year. The data is as follows: Before 12 8. 13 11 2 6. After 18 20 17 9. 25 14 8 2 10 21 Difference 12 2 (A - B) -4 -8 1 Can she say that the potion works? (Use a = .10) Ho: mu d = 0 Ha: mu d > 0 10. Eleven sets of fraternal twins are tracked to see the number of years of education. The results are as follows: 12 14 11 20 16 13 12 19 9. Sister 14 17 14 17 16 14 19 11 18 16 17 12 Brother Is there a significant difference in the years of education between a fraternal brother and sister? (a = .10) 417
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