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How to Read Rank Tables

Go to Rank Table for Sample Size:  [2-6][7-9][10-13][14-16][17-18][19-20][21-22][23-24][25]

 

To read the Median Rank (50%) of the 10th failure from a sample of 25 units:

  1. Select the appropriate sample size table (i.e. 25).
  2. Read the value for the appropriate Order Number (i.e. O/N = 10) from the 50% column, as highlighted in yellow below: 0.38161 or 38.161%.
  3. For Ranks other than Median Ranks (other than 50%), use the appropriate percentage column.
Sample Size=25
O/N 10% 20% 30% 40% 50% 60% 70% 80% 90%
1 0.00421 0.00889 0.01420 0.02020 0.02730 0.03600 0.04700 0.06230 0.08799
2 0.02150 0.03310 0.04380 0.05460 0.06620 0.07926 0.09480 0.11509 0.14687
. . . . . . . . . .
. . . . . . . . . .
8 0.19625 0.23032 0.25657 0.28001 0.30270 0.32604 0.35166 0.38235 0.42582
9 0.23032 0.26656 0.29418 0.31865 0.34215 0.36619 0.39240 0.42357 0.46734
10 0.26529 0.30341 0.33217 0.35747 0.38161 0.40616 0.43276 0.46419 0.50795
11 0.30111 0.34082 0.37052 0.39646 0.42108 0.44596 0.47277 0.50424 0.54772
12 0.33774 0.37878 0.40921 0.43562 0.46054 0.48559 0.51244 0.54375 0.58668
. . . . . . . . . .
. . . . . . . . . .
24 0.85313 0.88491 0.90520 0.92074 0.93377 0.94535 0.95619 0.96690 0.97852
25 0.91201 0.93765 0.95298 0.96401 0.97265 0.97977 0.98583 0.99111 0.99579