표 4. | Table 4. 시료 수 분석 결과 (신뢰도 80%, 신뢰수준 60%, 시험기간 1,920시간) | Results of sample size analysis (reliability 80%, confidence level 60%, test time 1,920hr)

Sample Size	Test Time for 0 Failures	Test Time for 1 Failures	Test Time for 2 Failures
1	3,891	N/A	N/A
2	2,751	4,961	N/A
3	2,246	3,719	5,535
4	1,945	3,116	4,284
5	1,740	2,739	3,651
6	1,588	2,473	3,242
7	1,470	2,273	2,949
8	1,376	2,114	2,724
9	1,297	1,985	2,544
10	1,230	1,877	2,396