basicstatisticsuseofminitab英文(編輯修改稿)
2025-03-23 04:19 本頁面
【文章內(nèi)容簡介】 The interquartile range is another measure of dispersion. IQR = Q3 Q1 ? The interquartile range is less sensitive to extreme values in a sample than the range. ? For the two samples (1, 3, 5, 8, 9 and 1, 5, 5, 5, 9), their interquartile ranges are 5 and 0 respectively. 16 Belton Confidential: For training only Measure of Shape Skewness ? Skewness ? The degree of assymmetry of a distribution around its mean is referred to as its skewness. 17 Belton Confidential: For training only Measure of Shape Kurtosis ? Kurtosis ? Kurtosis characterizes the relative peakedness or flatness of a distribution pared to a normal (mesokurtic) distribution. 18 Belton Confidential: For training only MiniTab’s Descriptive Statistics ? Stat ? Basic Statistics ? Display Descriptive Statistics ? produces statistics for each column of data (or subsets within a column) and displays them in the Session Window and optionally in a graph ? the user has no control over which statistics are puted/displayed ? Stat ? Basic Statistics ? Store Descriptive Statistics ? descriptive statistics for each column (or subsets within a column) are displayed in adjacent columns within the Worksheet ? the user can select which statistics are to be puted/displayed, but has no control over the order in which they are displayed ? Instructor will show you the method of using Minitab. 19 Belton Confidential: For training only Graphical Presentation Visual interpretation the the data set. Common graphical tools to illustrate a data set: ? Dot Plot ? Box Plot ? Histogram ? Stem Leaf Diagram 20 Belton Confidential: For training only Dot Plot ? The dot plot is useful for displaying a small body of data. ? The location or central tendency in the data set and its spread or dispersion are easily identified. ? It can also be used in paring two or more data sets. 21 Belton Confidential: For training only Dot Plot The pull strength of bonding wires from two suppliers are shown below A : B : The Dot Plot reveals that wires from supplier A seems to result in lower pull strength , but the variability within both groups is about the same. Suppl i er ASuppl i er B22 Belton Confidential: For training only Box Whiskers Plot (Box Plo
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