tailieunhanh - Engineering Statistics Handbook Episode 8 Part 1

Tham khảo tài liệu 'engineering statistics handbook episode 8 part 1', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . Interaction Effects Conclusions from the DEX Interaction Effects Plot We can make the following conclusions from the dex interaction effects plot. 1. Important Factors Looking for the plots that have the steepest lines that is largest effects we note that o X1 number of turns is the most important effect estimated effect o X2 winding distance is next most important estimated effect o X3 wire gage is relatively unimportant Q All three 2-factor interactions are relatively unimporant. 2. Best Settings As with the main effects plot the best settings to maximize the sensitivity are X1X2X3 1 -1 1 but with the X3 setting of 1 mattering little. NIST SEMATECH HOME TOOLS it AIDS search BACK NEMĨ http div898 handbook pri section6 2 of 2 5 1 2006 10 31 47 AM . Main and Interaction Effects Block Plots Conclusions It is recalled that the block plot will access factor importance by the degree of consistency from the robustness of the factor effect over a variety of conditions. In this light we can make the Block Plots following conclusions from the block plots. 1. Relative Importance of Factors All of the bar heights in plot 1 turns are greater than the bar heights in plots 2 and 3. Hence factor 1 is more important than factors 2 and 3. 2. Statistical Significance In plot 1 looking at the levels within each bar we note that the response for level 2 is higher than level 1 in each of the 4 bars. By chance this happens with probability 1 24 1 16 . Hence factor 1 is near-statistically significant at the 5 level. Similarly for plot 2 level 1 is greater than level 2 for all 4 bars. Hence factor 2 is near-statistically significant. For factor 3 there is not consistent ordering within all 4 bars and hence factor 3 is not statistically significant. Rigorously speaking then factors 1 and 2 are not statistically significant since is not 5 on the other hand such near-significance is suggestive to the analyst that such .

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