3. Callabas (2009) demonstrated that Tai Chi can significantly increase memory i
ID: 3174028 • Letter: 3
Question
3. Callabas (2009) demonstrated that Tai Chi can significantly increase memory in older adults. Participants were 60 years old and older with normal age-related cognitive impairment. Memory (the number of errors in list-learning) was measured at the beginning of an 8-week Tai Chi course and again at the end
Participant
Pre-test
Post-test
A
2
3
B
5
5
C
0
0
D
7
8
E
4
9
F
7
7
G
6
5
H
4
2
I
9
10
J
6
11
K
3
8
L
2
6
M
5
2
N
7
10
Is there a significant difference in memory between the two conditions? Use a one-tailed test with a = .05.
please show steps
Participant
Pre-test
Post-test
A
2
3
B
5
5
C
0
0
D
7
8
E
4
9
F
7
7
G
6
5
H
4
2
I
9
10
J
6
11
K
3
8
L
2
6
M
5
2
N
7
10
Explanation / Answer
for above t stat p value =0.0419
as p value is less then 0.05 level, hence we reject null hypothesis; and accept that there is a significant difference in memory between the two conditions
pre test post test difference(d) 2 3 1 5 5 0 0 0 0 7 8 1 4 9 5 7 7 0 6 5 -1 4 2 -2 9 10 1 6 11 5 3 8 5 2 5 3 5 2 -3 7 10 3 mean 1.285714286 std deviaition 2.5848 std error= std dev/(n)^(1/2) 0.6908 t stat= (d-0)/std error 1.8611Related Questions
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