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r table
Correlation coefficient

The correlation between x and y will be significant at the given probability level if your calculated value of r exceeds the tabulated r value.

Note 1: you should ignore the sign (+ or -) of your r value when reading this table.

Note 2: the value of r ALWAYS lies between 0 and 1 (or 0 and -1). If your calculated r value is more than 1 (or less than -1) then you made an error in your calculations.

Note 3: If you cannot find the required degrees of freedom, use the next lowest one.

Degrees of Freedom

Probability, p

  0.05 0.01 0.001
1 0.997 1.000 1.000
2 0.950 0.990 0.999
3 0.878 0.959 0.991
4 0.811 0.917 0.974
5 0.755 0.875 0.951
6 0.707 0.834 0.925
7 0.666 0.798 0.898
8 0.632 0.765 0.872
9 0.602 0.735 0.847
10 0.576 0.708 0.823
11 0.553 0.684 0.801
12 0.532 0.661 0.780
13 0.514 0.641 0.760
14 0.497 0.623 0.742
15 0.482 0.606 0.725
16 0.468 0.590 0.708
17 0.456 0.575 0.693
18 0.444 0.561 0.679
19 0.433 0.549 0.665
20 0.423 0.457 0.652
25 0.381 0.487 0.597
30 0.349 0.449 0.554
35 0.325 0.418 0.519
40 0.304 0.393 0.490
45 0.288 0.372 0.465
50 0.273 0.354 0.443
60 0.250 0.325 0.408
70 0.232 0.302 0.380
80 0.217 0.283 0.357
90 0.205 0.267 0.338
100 0.195 0.254 0.321

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This site is no longer maintained and has been left for archival purposes

Text and links may be out of date