【文章內(nèi)容簡介】 epare a scatter diagram and regression model (calculate correlation co efficient) using Reg1$$$ as the response variable and Region1 as the predictor. Measure Analyze Improve Control GE Company Proprietary Version 16 Minitab Primer Two Sample TTest and Confidence Interval Twosample T for region1 vs region2 N Mean StDev SE Mean region1 100 region2 100 95% . for mu region1 mu region2: ( , ) TTest mu region1 = mu region2 (vs not =): T= P= DF= 197 Hypothesis Test Results... Is There a Difference in the Average Level of Receivables Ages Between Regions 1 amp。 2? Measure Analyze Improve Control GE Company Proprietary Version 17 Minitab Primer Correlations (Pearson) Correlation of region1 and reg1$$$ = Correlation Coefficient (r)... Scatter Plot... 8 07 06 05 04 03 02 07 5 06 5 05 5 04 5 03 5 02 5 01 5 0r e g io n 1reg1$$$Establish a Relationship Between Response and Predictor Before Building the Model Measure Analyze Improve Control GE Company Proprietary Version 18 Minitab Primer 8 07 06 05 04 03 02 08 5 07 5 06 5 05 5 04 5 03 5 02 5 01 5 0r e g i o n 1reg1$$$R S q u a r e d = 0 . 8 6 5Y = 2 9 . 0 8 2 6 + 9 . 6 5 5 8 4 XR e g r e s s i o n P l o tFitted Line Plot... Measure Analyze Improve Control GE Company Proprietary Version 19 Minitab Primer Regression Analysis The regression equation is reg1$$$ = + region1 Predictor Coef Stdev tratio p Constant region1 s = Rsq = % Rsq(adj) = % Analysis of Variance SOURCE DF SS MS F p Regression 1 948965 948965 Error 98 148702 1517 Total 99 1097667 Unusual Observations Obs. region1 reg1$$$ Fit Residual 10 31 53 X 64 70 76 X 78 X 92 X 95 98 R denotes an obs. with a large st. resid. X denotes an obs. whose X value gives it large influence. Regression Results... Measure Analyze Improve Control GE Company Proprietary Version 20 Minitab Primer Choice of Tool Depends Upon the Requirements of the Analysis Demonstration Four ? STAT ? Basic Statistics ? Descriptive Statistics ? 1Sample t ? 2Sample t ? Correlation ? Tables ? Tally ? Chisquare Test ? CALC ? Probability Distributions ? Normal ? STAT ? ANOVA ? ONEWAY Basic Statistical Analysis ? GRAPH ? Plot ? Time Series Plot ? Histogram ? Boxplot ? Character Graphs ? Dotplot ? STAT ? SPC ? Run Chart Graphical Analysis ? STAT ? Regression ? Regression ? Fitted Line Plot Regression Analysis GE Company Proprietary Version 21 Minitab Primer Demonstration Four Example: Comparing Many Different Business Regions Data File: Variables: Country1 Country5 Evaluate the relative performance of five different business regions using boxplots and dotplots. GE Company Proprietary Version 22 Minitab Primer 543212 0 01 0 00C O U N T R YAGINGBoxplot Results... Measure Analyze Improve Control GE Company Proprietary Version 23 Minitab Primer Character Dotplot . .: :: :: :: :: :: .::: :::: :::: ..:::::. ++++++AGING (1) .: :: :.: . ..:::::: . . . :. ::::::::::.::: ++++++AGING(2) . : : . : : : . . :::.:.:.: : . .:.::::::::: :.:. ++++