Tham khảo tài liệu 'engineering statistics handbook episode 1 part 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | . Linear Slope Plot Definition Group Slopes Versus Group ID Linear slope plots are formed by Vertical axis Group slopes from linear fits Horizontal axis Group identifier A reference line is plotted at the slope from a linear fit using all the data. Questions The linear slope plot can be used to answer the following questions. 1. Do you get the same slope across groups for linear fits 2. If the slopes differ is there a discernible pattern in the slopes Importance Checking Group Homogeneity For grouped data it may be important to know whether the different groups are homogeneous . similar or heterogeneous . different . Linear slope plots help answer this question in the context of linear fitting. Related Techniques Linear Intercept Plot Linear Correlation Plot Linear Residual Standard Deviation Plot Linear Fitting Case Study The linear slope plot is demonstrated in the Alaska pipeline data case study. Software Most general purpose statistical software programs do not support a linear slope plot. However if the statistical program can generate linear fits over a group it should be feasible to write a macro to generate this plot. Dataplot supports a linear slope plot. NIST SEMATECH HOME tools RAIDS PSÉARCH r ACK NEXT http div898 handbook eda section3 2 of 2 5 1 2006 9 56 48 AM . Linear Residual Standard Deviation Plot ENGINEERING STATISTICS HANDBOOK hW tools raids lỉEÂtCH BACK Nixf 1. Exploratory Data Analysis . EDA Techniques . Graphical Techniques Alphabetic . Linear Residual Standard Deviation Plot Purpose Linear residual standard deviation RESSD plots are used to Detect graphically assess whether or not linear fits are consistent across Changes in groups. That is if your data have groups you may want to know if a Linear single fit can be used across all the groups or whether separate fits are Residual required for each group. Standard . Deviation The residual standard deviation is a goodness-of-fit .
