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STID1103 2009. TO BE EXPLORED… WHY CHARTS & GRAPHS (C&G)? DESCRIBING DATA WITH C&G CREATING A C&G...
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Transcript of STID1103 2009. TO BE EXPLORED… WHY CHARTS & GRAPHS (C&G)? DESCRIBING DATA WITH C&G CREATING A C&G...
![Page 1: STID1103 2009. TO BE EXPLORED… WHY CHARTS & GRAPHS (C&G)? DESCRIBING DATA WITH C&G CREATING A C&G IN EXCEL CONCLUSION HANDS-ON EXERCISE.](https://reader036.fdocuments.us/reader036/viewer/2022062315/5697bf7d1a28abf838c84ab2/html5/thumbnails/1.jpg)
STID11032009
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TO BE EXPLORED…
• WHY CHARTS & GRAPHS (C&G)?
• DESCRIBING DATA WITH C&G
• CREATING A C&G IN EXCEL
• CONCLUSION
• HANDS-ON EXERCISE
![Page 3: STID1103 2009. TO BE EXPLORED… WHY CHARTS & GRAPHS (C&G)? DESCRIBING DATA WITH C&G CREATING A C&G IN EXCEL CONCLUSION HANDS-ON EXERCISE.](https://reader036.fdocuments.us/reader036/viewer/2022062315/5697bf7d1a28abf838c84ab2/html5/thumbnails/3.jpg)
Intro: why use c&g?
• Charts and graphs can be used to pictorially represent data.
A Pie Chart Showing the Percentage Distribution of Deaths from all Causes
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Intro: why use c&g?• pie chart is used when
– the total of something is known – to show the pieces that make it up.
• other graphs e.g. line chart can be extended with no arbitrary ending points
What can we see?
![Page 5: STID1103 2009. TO BE EXPLORED… WHY CHARTS & GRAPHS (C&G)? DESCRIBING DATA WITH C&G CREATING A C&G IN EXCEL CONCLUSION HANDS-ON EXERCISE.](https://reader036.fdocuments.us/reader036/viewer/2022062315/5697bf7d1a28abf838c84ab2/html5/thumbnails/5.jpg)
Intro: why use c&g?
Such chart enables us to answer questions such as– How many students graduated in 1992?– In what year did we have the greatest number of
graduates?– What is the fewest number of graduates we have
had?– Were there more graduates in 1989 or in 1998?– Taking the whole graph as a basis, will we likely have
more or less graduates in 2000 than we had in 1999?
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Describing Data with Charts and Graphs
• graphical representation of data is far more effective in conveying information than are tables of data
• Excel has nine basic type of charts and graphs with many subclassifications within each of the nine types
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Describing Data with Charts and Graphs
• Column
• Bar
• Area
• Line
• High-low
• Radar• Scatter-plot• Pie & donut• 3D surface plot
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Column chart
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Bar chart
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Area chart
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Line chart
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High-low chart
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Radar chart
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Scatter Plots
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Pie & Donut charts
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3D surface plots
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Describing Data with Charts and Graphs
Purpose of the Chart Appropriate Chart TypeCompare categorical data Column Chart; Bar Chart, Radar Chart
Compare series of data over time
Area Chart, Line Chart, Column Chart (stacked), High-Low Chart
Percentage of total comparisons
Pie Chart, Donut Chart, Stacked Bar or Column chart
Relationship between two variables
Scatter Plot
Relationship between three variables
3-Dimension Surface Plot
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Creating a chart in Excel
1. Enter data to be plotted on worksheet
2. Highlight data to be plotted
3. Begin Chart Wizard• select Chart from the Insert Menu, or• by pressing the F11 key, or • by selecting the ChartWizard Icon from the Toolbar
4. Follow instructions to create/change graph in ChartWizard
Hands-on exercise
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Conclusion
• Graphs can be used to illustrate many types of data and are not limited to the simpler types such as line and bar.
• They should be used to make facts clearer and more understandable.
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questions
• The daily high temperatures in your city for a year.• The sources of income for your city.• Low temperature trends over a year.• Monthly sales by region.• Average amount of milk drank in a year by different age groups.• How your income is spent.• The average height of men and women during the 20th century.• The weekly commission you have earned as a salesperson.• The monthly total of TV sets you have sold.• The average age of women when they have their first child.
What type of graph would you use to display the following types of data:
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answers
• Line or bar graph.• Pie chart (Circle graph).• Scatter Diagram (Scattergram).• [Multiple] bar or line graph.• Pictogram or bar chart.• Pie chart.• Scatter diagram, [double] bar or line graph.• Line or bar graph.• Pictograph or bar graph.• Scatter diagram, line or bar graph.
Suggested answers are as the following. For most of these you could use more than one type of graph or chart.