T critical values - Colorado State University

t critical values

Central area

t curve

-t critical

0

value

t critical value

Confidence area captured: 0.90

Confidence level:

90%

1

6.31

2

2.92

3

2.35

4

2.13

5

2.02

6

1.94

7

1.90

8

1.86

9

1.83

10

1.81

11

1.80

12

1.78

13

1.77

14

1.76

15

1.75

16

1.75

17

1.74

Degrees of

18

1.73

Freedom

19

1.73

20

1.73

21

1.72

22

1.72

23

1.71

24

1.71

25

1.71

26

1.71

27

1.70

28

1.70

29

1.70

30

1.70

40

1.68

60

1.67

70

1.67

80

1.66

90

1.66

100

1.66

1000

1.65

z critical values

1.645

for 2-tailed tests

0.10

for 1-tailed tests

0.05

0.95 95%

12.71 4.30 3.18 2.78 2.57

2.45 2.37 2.31 2.26 2.23 2.20 2.18 2.16 2.15 2.13 2.12 2.11 2.10 2.09 2.09 2.08 2.07 2.07 2.06 2.06 2.06 2.05 2.05 2.05 2.04 2.02 2.00 1.99 1.99 1.99 1.98 1.96

1.96

0.05

0.025

0.98 98%

31.82 6.97 4.54 3.75 3.37

3.14 3.00 2.90 2.82 2.76 2.72 2.68 2.65 2.62 2.60 2.58 2.57 2.55 2.54 2.53 2.52 2.51 2.50 2.49 2.49 2.48 2.47 2.47 2.46 2.46 2.42 2.39 2.38 2.37 2.37 2.36 2.33

2.33

0.02

0.01

0.99 99%

63.66 9.93 5.84 4.60 4.03

3.71 3.50 3.36 3.25 3.17 3.11 3.06 3.01 2.98 2.95 2.92 2.90 2.88 2.86 2.85 2.83 2.82 2.81 2.80 2.79 2.78 2.77 2.76 2.76 2.75 2.70 2.66 2.65 2.64 2.63 2.63 2.58

2.58

0.01

0.005

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