TWO-LEVEL FACTORIAL AND FRACTIONAL FACTORIAL DESIGNS IN BLOCKS OF SIZE TWO 75 TABLE 3.Results from Paired Comparison 22 Design Testers Treatments Combination Results,Days Comparisons E GB the orthopedic staff and their HMO (Health Main Whatever specific choice is made for 7.we can fol- sible. y high,so gs were nee prices c Variation between patients is very the four types. sense o use washed and dried overnight,and worn until they be come damaged and ineffective,when the numberso tions dependent onan assumed (oron the observed) mean valuei Conclusion are given in Table 3. m ons.In gen tion 4/21. rod that is (k-p)locke runs or )times the number of runs in ter quality stockings.Also the better stockings last t. type mar make sense when runs are extremely variable ove ment average values from these data due to the un- ded The ve the est be back-solved to give individual pseudo-data values ould be th mean value for the data.The estimation equations Acknowledgments +2+g+4=4(unknown) We thank both referees for a very detailed analy +-+=30 -++4=126 under Grant MDA04-95-H-1020 from the National 1-2-始+4=22 Security Agency. References data,484/8=60.5,as y.We then obtain the array of mean responses G Key Words:Blocking.Factorial Designs.Fructional Factorial Designs. Vol.29.No.1.January 1997 Journal of Quality Technology Reproduced with permission of the copyright owner.Further reproduction prohibited without permission. Reproduced with permission of the copyright owner. Further reproduction prohibited without permission