Presentation on theme: "Slide No. 1 Spreadsheet Charts: From Digits to Drawings H Spreadsheet Software H Chart types H Good and Bad H Ethics."— Presentation transcript:
Slide No. 1 Spreadsheet Charts: From Digits to Drawings H Spreadsheet Software H Chart types H Good and Bad H Ethics
Slide No. 2 Spreadsheet Software n Allows the user to take control of numbers, manipulating them in ways that would be difficult or impossible otherwise n Charts - were once very difficult, now part of the software n can turn the worksheet numbers into charts automatically
Slide No. 3 Creating Charts from Numbers n Offer a variety of basic chart types and options for embellishing charts n differences among chart types are more that aesthetic n each chart type is well suited for communicating particular types of information
Slide No. 4 Pie Chart n Relative proportions of the parts to a whole
Slide No. 5 Line Chart n Show trends or relationships over time n show relative distribution of one variable through another (the classic bell-shaped normal curve)
Slide No. 6 Example of Line Chart
Slide No. 7 Bar Charts n Appropriate when data falls into a few categories. n Bars can be stacked in a stack chart that shows how proportions of a whole change over time.
Slide No. 8 Example of a Bar Chart
Slide No. 9 Scatter Charts n Used to discover, rather that display a relationship between two variables
Slide No. 10 Example of a Scatter Chart (Graduation Rate vs Crime Rate)
Slide No. 11 What about graphs and charts? n 1992 Presidential election - ( Ross Perot used many graphs) n One picture is worth a thousand words n Candidates spoke about trend lines, investments and deficits and did so using colorful charts and graphs. n voodoo economics
Slide No. 12 What about graphs and charts? n It is simple to create a line graph that drives home the increase in the national debt, n a bar graph that compares market share for U.S. and foreign automobile manufacturers. n When you design a graph you have a responsibility to your audience
Slide No. 13 The “real” Trend
Slide No. 14 Different Axis Calibration
Slide No. 15 Making Smart Charts n Powerful communication tool n not designed intelligently... can mislead or confuse
Slide No. 16 Guidelines n Choose the right chart for the job. n Keep it simple, familiar and understandable n Strive to reveal the truth, not hide it.
Slide No. 17 Spreadsheet Ethics: Making Numbers Lie n Figures do not lie n …but, you must be careful about the figures you see, for they are only as accurate as the person who entered them.