Critical r-values for various \(\alpha\)-levels and Degrees of freedom.
Find the appropriate critical value at the intersection of \(\alpha\) and df (where df = N -2).
|
|
alpha-level
|
|
df
|
0.10
|
0.05
|
0.025
|
0.01
|
|
1
|
0.951
|
0.988
|
0.997
|
1.000
|
|
2
|
0.800
|
0.900
|
0.950
|
0.980
|
|
3
|
0.687
|
0.805
|
0.878
|
0.934
|
|
4
|
0.608
|
0.729
|
0.811
|
0.882
|
|
5
|
0.551
|
0.669
|
0.754
|
0.833
|
|
6
|
0.507
|
0.621
|
0.707
|
0.789
|
|
7
|
0.472
|
0.582
|
0.666
|
0.750
|
|
8
|
0.443
|
0.549
|
0.632
|
0.715
|
|
9
|
0.419
|
0.521
|
0.602
|
0.685
|
|
10
|
0.398
|
0.497
|
0.576
|
0.658
|
|
11
|
0.380
|
0.476
|
0.553
|
0.634
|
|
12
|
0.365
|
0.458
|
0.532
|
0.612
|
|
13
|
0.351
|
0.441
|
0.514
|
0.592
|
|
14
|
0.338
|
0.426
|
0.497
|
0.574
|
|
15
|
0.327
|
0.412
|
0.482
|
0.558
|
|
16
|
0.317
|
0.400
|
0.468
|
0.543
|
|
17
|
0.308
|
0.389
|
0.456
|
0.529
|
|
18
|
0.299
|
0.378
|
0.444
|
0.516
|
|
19
|
0.291
|
0.369
|
0.433
|
0.503
|
|
20
|
0.284
|
0.360
|
0.423
|
0.492
|
|
21
|
0.277
|
0.352
|
0.413
|
0.482
|
|
22
|
0.271
|
0.344
|
0.404
|
0.472
|
|
23
|
0.265
|
0.337
|
0.396
|
0.462
|
|
24
|
0.260
|
0.330
|
0.388
|
0.453
|
|
25
|
0.255
|
0.323
|
0.381
|
0.445
|
|
26
|
0.250
|
0.317
|
0.374
|
0.437
|
|
27
|
0.245
|
0.311
|
0.367
|
0.430
|
|
28
|
0.241
|
0.306
|
0.361
|
0.423
|
|
29
|
0.237
|
0.301
|
0.355
|
0.416
|
|
40
|
0.202
|
0.257
|
0.304
|
0.358
|
|
50
|
0.181
|
0.231
|
0.273
|
0.322
|
|
60
|
0.165
|
0.211
|
0.250
|
0.295
|
|
70
|
0.153
|
0.195
|
0.232
|
0.274
|
|
80
|
0.143
|
0.183
|
0.217
|
0.257
|
|
90
|
0.135
|
0.173
|
0.205
|
0.242
|
|
100
|
0.128
|
0.164
|
0.195
|
0.230
|
|
110
|
0.122
|
0.156
|
0.186
|
0.220
|
|
120
|
0.117
|
0.150
|
0.178
|
0.210
|
|
130
|
0.112
|
0.144
|
0.171
|
0.202
|
|
140
|
0.108
|
0.139
|
0.165
|
0.195
|
|
150
|
0.105
|
0.134
|
0.159
|
0.189
|
|
200
|
0.091
|
0.116
|
0.138
|
0.164
|
|
300
|
0.074
|
0.095
|
0.113
|
0.134
|
|
400
|
0.064
|
0.082
|
0.098
|
0.116
|
|
500
|
0.057
|
0.073
|
0.088
|
0.104
|
|
1000
|
0.041
|
0.052
|
0.062
|
0.073
|