การทดสอบค่า t-test

1. t-Test
2
N
X1
X2 2 X1 - X2 D
D)/N =
2
X1 - X2 = D
N X1 - X2 = D
1 -
2 = )
0
df = N - 1) t-test
10
2

2. 7.60
8.90 -1.30
-13 127
D D2
1
2
3
4
5
6
7
8
9
10
7
9
4
15
6
3
9
5
6
12
5
15
7
11
4
7
8
10
6
16
2
-6
-3
4
2
-4
1
-5
0
-4
4
36
9
16
4
16
1
25
0
16
Sum
Mean
76
7.60
89
8.90
-13
-
1.30
127
t
t 1.18
df = 10 - 1 = 9 t
two-tail 0.05 2.262 t
t t

3. t