inst10 1 - Graphical Analysis Class 10.1 Learning...

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Graphical Analysis Class 10.1
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Learning Objectives Use tables and graphs as problem solving tools Learn and apply different types of graphs and scales Review graphing in Excel Edit graphs Use linear regression by hand, and in Excel.
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Proper Use of Tables & Graphs Engineers record and present data in two primary formats: tables and graphs Height  H (m)  Temp  T ( ° C)  Pressure  P (kPa)       0  15.0     101.3     300  12.8  97.7     600  11.1  94.2  0 2 4 6 8 10 12 14 16 0 500 1000 1500 Height (m) Temperature (C) 0 20 40 60 80 100 120 140 160 Pressure (kPa) Temp Pressure
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Variables Independent Variables The Cause X-Axis on Graphs (abscissa) Left Columns on Tables Dependent Variables The Effect Y-Axis on Graphs (ordinate) Right Columns on Tables
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Tables Tables should always have: Title Column headings with brief descriptive name and appropriate units. (Mathematical symbol is optional.) Use proper number of significant digits. Align decimal points in a column. Tables should always be referenced and discussed (at least briefly) in the text.
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Table Example Temperature and Pressure of Widgets at Various Heights Height H (m) Temp T ( ° C) Pressure P (kPa) 0 15.0 101.3 300 12.8 97.7 600 11.1 94.2
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Pair Exercise #1(3 min) Enter the following table in Excel Independent  Variable, x  Dependent  Variable, y1  Dependent  Variable, y2  2500  10  50  5000  100  100  7500  1000  150  10000  10000  200 
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Graphs Proper graphing of data involves: Selecting appropriate graph type Selecting scale and gradation of axes Labeling axes Plotting data points Plotting or fitting curves Adding titles, notes, and or legend
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Graphs - Types Travel Expenses 0 2 4 6 8 10 12 14 16 18 Food Gas Motel Expenses ($) 1. Pie Chart 2. Bar Graph
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Graphs - Types 4. Line Graph 0 2 4 6 8 10 12 14 16 0 500 1000 1500 Height (m) Temperature (C) 0 20 40 60 80 100 120 140 160 Pressure (kPa) Temp Pressure 1 2 3 4 5 6 7 0 7 8 0 2 4 Object 1 Object 2 Body Temperature ( 0 C Speed (m/s) Distance (m) 3. 3-D Graph
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Graphs Each graph must include: Title -- a clear, concise description Legend -- defines point symbols or line types Labeled axes -- name of variable and its units. (Note: The units can be enclosed in parentheses, or separated from the label by a comma.) Graphs should always be referenced/discussed in the text.
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Example Velocity of Three Runners During a 5-km Race
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Graphs - Data Categories 1. Observed - 0 200 400 600 800 1000 0 2 4 6 8 10 X, Independent Y, Response 2. Empirical - Fitted curve 0 200 400 600 800 1000 0 2 4 6 8 10 X, Independent 3. Theoretical - Mathematical models 0 200 400 600 800 1000 1200 0 2 4 6 8 10 12 X, Independent
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Gradation
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This note was uploaded on 09/01/2009 for the course PSYC 300 taught by Professor Cambron during the Spring '08 term at Texas A&M.

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inst10 1 - Graphical Analysis Class 10.1 Learning...

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