basicstatisticsuseofminitab(已修改)
2025-06-10 17:15 本頁面
【正文】 Basic Statistics amp。 Use of Minitab Belton Group Rex Wong Belton Confidential: For training only 2 Statistics Statistics is the branch of science that deals with the collection, presentation, analysis amp。 interpretation of data for the purpose of decisionmaking and problemsolving. Statistics is a critical skill in quality improvement as statistical techniques can be used to describe and to understand variability. Belton Confidential: For training only 3 Variability ? Variability is the result of changes in the conditions under which observations are made. ? Variability can e about due to changes in ? material quality ? machine settings or conditions ? manpower standards ? methods of processing ? measurement ? milieu (environment) Belton Confidential: For training only 4 Population amp。 Sample ? Population ? the entire set of measurements of interest ? Sample ? a subset of data from the population ? Parameters ? numerical measures of a population ? Statistics ? numerical measures of a sample Belton Confidential: For training only 5 Parameter vs Statistic Parameter Statistic Mean Variance Standard Deviation ? x2??2ssBelton Confidential: For training only 6 Type of data – “Gappiness” ? Whether there are gaps between successively observed values of a variable. Discrete Variable ? gaps exist between observations ? obtained by counting Continuous Variable ? no gaps exist between observations ? obtained by measuring Belton Confidential: For training only 7 Statistics Objectives ? Statistics is the branch of science that deals with the collection, presentation, analysis amp。 interpretation of data for the purpose of decisionmaking and problemsolving. Objectives of Statistics: ? data reduction — Descriptive Statistics ? inferential measurement — Inferential Statistics ? identification of relationships — Regression, ANOVA Belton Confidential: For training only 8 Statistics Overview Statistics Descriptive Statistics Inferential Statistics Graphical Presentations Numerical Measures Charts Tables Location Dispersion Shape Parameter Estimation Hypothesis Testing Point Estimate Interval Estimate Parametric Methods Nonparametric Methods Belton Confidential: For training only 9 Descr
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