This table gives percentage points of the standard normal distribution. These are the values of z for which a given percentage, P, of the standard normal distribution lies outside the range from -z to +z.
P (%) |
z |
90 |
0.1257 |
80 |
0.2533 |
70 |
0.3853 |
60 |
0.5244 |
50 |
0.6745 |
40 |
0.8416 |
30 |
1.0364 |
20 |
1.2816 |
15 |
1.4395 |
10 |
1.6449 |
5 |
1.9600 |
2 |
2.3263 |
1 |
2.5758 |
0.50 |
2.8070 |
0.25 |
3.0233 |
0.10 |
3.2905 |
0.01 |
3.8906 |