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Sample Size Required to Achieve a Desired Confidence Level

(with proportion defective = 0.01)

p=0.01

Number of Failures

Confidence Levels

60%

80%

90%

95%

99%

0 92 160 230 299 459
1 202 299 388 467 662
2 310 424 526 625 838
3 417 551 664 773 1002
4 522 671 789 913 1157
5 625 785 926 1049 1307
6 734 902 1051 1186 1453
7 839 1022 1175 1312  
8 943 1137 1297 1441  
9 1047 1251 1418    
10 1151 1364      
11 1255 1476      
12 1359        
13 1462        


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