Critical Values of t


Critical Values of Student’s t

2-tailed t-tests

df

.05 alpha

1

12.71

2

4.30

3

3.18

4

2.78

5

2.57

6

2.45

7

2.37

8

2.31

9

2.26

10

2.23

11

2.20

12

2.18

13

2.16

14

2.15

15

2.13

16

2.12

17

2.11

18

2.10

19

2.09

20

2.09

21

2.08

22

2.07

23

2.07

24

2.06

25

2.06

26

2.06

27

2.05

28

2.05

29

2.05

30

2.04

40

2.02

60

2.00

120

1.98

infinity

1.96

 

 

Adapted from Statistics Safari