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 18 20 After 17 9. 25 7 14 2 10 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
18
20
After
17
9.
25
7
14
8
10
21
Difference
1
12
6.
-4
-8
1
(A - B)
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:
Sister
14
16
13
12
19
9.
12
14
11
20
16
Brother
16
17
12
14
19
11
18
17
14
17
16
Is there a significant difference in the years of education between a fraternal brother and
sister? (a = .10)
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 18 20 After 17 9. 25 7 14 8 10 21 Difference 1 12 6. -4 -8 1 (A - B) 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: Sister 14 16 13 12 19 9. 12 14 11 20 16 Brother 16 17 12 14 19 11 18 17 14 17 16 Is there a significant difference in the years of education between a fraternal brother and sister? (a = .10)
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