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Exploratory Data Analysis_9

Tham khảo tài liệu 'exploratory data analysis_9', kỹ thuật - công nghệ, điện - điện tử phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 1.3.5.18. Yates Analysis Related Techniques Multi-factor analysis of variance Dex mean plot Block plot Dex contour plot Case Study The Yates analysis is demonstrated in the Eddy current case study. Software Many general purpose statistical software programs including Dataplot can perform a Yates analysis. NIST SEMATECH HOME pTOOLS AIDS rãÉARCH l ACK NỄXĨ http www.itl.nist.gov div898 handbook eda section3 eda35i.htm 5 of 5 5 1 2006 9 57 48 AM 1.3.5.18.1. Defining Models and Prediction Equations ENGINEERING STATISTICS HANDBOOK home TOOLS Ậ AIDS ISEAtCH BACK next 1. Exploratory Data Analysis 1.3. EDA Techniques 1.3.5. Quantitative Techniques 1.3.5.18. Yates Analysis 1.3.5.18.1. Defining Models and Prediction Equations Parameter In most cases of least squares fitting the model coefficients for previously added terms Estimates change depending on what was successively added. For example the X1 coefficient Don t might change depending on whether or not an X2 term was included in the model. This Change as is not the case when the design is orthogonal as is a 23 full factorial design. For Additional orthogonal designs the estimates for the previously included terms do not change as Terms additional terms are added. This means the ranked list of effect estimates Added simultaneously serves as the least squares coefficient estimates for progressively more complicated models. Yates For convenience we list the sample Yates output for the Eddy current data set here. Table NOTE--DATA MUST BE IN STANDARD ORDER NUMBER OF OBSERVATIONS 8 NUMBER OF FACTORS 3 NO REPLICATION CASE PSEUDO-REPLICATION STAND. DEV. 0.20152531564E 00 PSEUDO-DEGREES OF FREEDOM 1 THE PSEUDO-REP. STAND. DEV. ASSUMES ALL 3 4 5 .-TERM INTERACTIONS ARE NOT REAL BUT MANIFESTATIONS OF RANDOM ERROR STANDARD DEVIATION OF A COEF. 0.14249992371E 00 BASED ON PSEUDO-REP. ST. DEV. GRAND MEAN 0.26587500572E 01 GRAND STANDARD DEVIATION 0.17410624027E 01 99 CONFIDENCE 95 CONFIDENCE 99.5 POINT OF LIMITS - LIMITS - T .