Downloaded from https://www.everyspec.com AMMMi1U8 ExazngLeNo.2( Find the 1-sample plan that gives a - 1%, - 2.5 %, v - 2. Predure Examplo 1. Use Table V In Ref, 18, or equiva- 1. Use the 2 columns lent chi-square tables, Use Eq. csqf(X'. V) - 1% 3-21. csqf(XI; v) 100% - 2.5k = 97. 5%. 2 2. By trial and error, find the v such 2. 2 that Eq. 3-23 is satisfied. Use only even P since .'* w v/12 i an integer. at 30: 47.0/15.0 = 3.13 The underline Indicates a good 40: 59.3/22.2 2.67 answer. v 74, 99.7/48.7 2.056 = 60: 83.3/37.5 2.22 80: 106.6/53.5 - 1.993 vp 78: 104. 3/51.9 = 2.010. 3. Calculate r*. Reohoose a, j, y to 3. r* - 80/2 "540 fit* choose y = 1. 993, then a : 1%, / 2.5% still. 4.
Use Eqs. 3..1 and 3-22 to find T*. 4. X1%,80 24T* -53.5 X17.5 ,80 - 2XIT = 106.6 T* - 26.75/X 0 - 53.3/X = 26. 750o - 53.381. Twenty, seven to 53 (from last line of step 4) iD an outlandish maximum number of failures for any large equipments; so the a, ., y cannot all be this small. The time truncation, about 2700, is also outlandish for any long-life item. I 1;. ... ....... ..