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ChE253K Spring09 Lecture02.Rev01

# ChE253K Spring09 Lecture02.Rev01 - Class Business Homework...

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1 26Jan2009 ChE 253K Spring09 Lecture 02 Class Business Homework 01 available Homework -- Classwork

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2 ChE 253K Spr09 Lecture 02 26Jan2009 Exploring 1-D Data with Plots Lecture 02 -- Descriptive Statistics
3 26Jan2009 ChE 253K Spring09 Lecture 02 Outline Of This Lecture Exploratory Data Analysis Data. Questions & Answers. Data Sequence Plots Run Plot Control Chart Lag Plot Data Distribution Plots Stem-Leaf Plot Interval & Cumulative Histograms & Ogives Probability Plot

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4 26Jan2009 ChE 253K Spring09 Lecture 02 Additional Material NIST Engineering Statistics Hndbk optional reading on Bb IOU an explanation, later Control Charts Normal Distribution
5 26Jan2009 ChE 253K Spring09 Lecture 02 Raw Data X(i) = { 138 140 102 148 130 130 145 160 108 101 155 155 190 118 155 155 135 118 175 130 125 150 120 190 125 195 142 125 140 180 140 160 164 145 110 150 130 157 155 150 150 150 165 150 138 115 153 123 145 116 170 140 150 180 170 110 215 121 160 116 136 145 115 155 95 160 190 112 135 133 150 155 120 108 155 155 131 150 170 175 122 120 125 125 185 150 180 190 155 140 170 130 135 145} (N = 94) Sources: Gonick, Statistics.

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6 26Jan2009 ChE 253K Spring09 Lecture 02 Questions: WWWWHY Who? Best person for answers What? Quantity and units Where? Location and sampling When? Changing conditions How? Method and accuracy Why? Question to answer
7 26Jan2009 ChE 253K Spring09 Lecture 02 Questions: WWWWHY Who? Me What? Body weight in lbs. Where? Random college, m & f When? Within 10 years How? Self-reported Accurate? Why? As an exercise

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8 26Jan2009 ChE 253K Spring09 Lecture 02 Sequence Plots Givens: 25 measurements in sequence or as (point, time) data Assumptions Plots Stable location (center) and spread Run Plot unControl Chart Random, uncorrelated Lag Plot
9 26Jan2009 ChE 253K Spring09 Lecture 02 Run Plot Stable or trending location & spread? Plot measurements vs. time or sequence # Measurement scale? Broad: See the trend , before the points Run Plot 0 100 200 300 0 25 50 75 100 Sequence Measurement

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10 26Jan2009 ChE 253K Spring09 Lecture 02 Run Plot Homework X(i) = {138 140 102 148 ... 180 140 160} (N = 32) 0 20 40 60 80 100 Sequence Measurements
11 26Jan2009 ChE 253K Spring09 Lecture 02 Run Plot Homework X(i) = {138 140 102 148 ... 180 140 160} (N = 32) 50 75 100 125 150 175 200 225 250 0 20 40 60 80 100 Sequence Measurements

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12 26Jan2009 ChE 253K Spring09 Lecture 02 (un)Control Chart Stable or trending center & spread?
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