Graphical Displays of Data 0.0 / 5 ? zoologyGraphsUniversityAll boards Created by: rosieevieCreated on: 22-01-17 19:07 Bar Charts Each bar = single datum Relative sizes is more important than showing actual number Compare arranged data X axis series of labels 1 of 6 Histograms Similar to bar chart Each bar represents range of values Connected data - line? 2 of 6 Line Graph Change over time/evenly spaced values 'Join the dots' plotting 3 of 6 XY Scatter Graph Relationship between pair of measurements Show a correlation Correlation is not causation R2 value: 0 = No correlation 1 = Perfect correlation Line of best fit - any data set but not always showing a relationship Logs allow straight line of best fit Treadline is not a line of best fit - correlation over time (usually join the dots) 4 of 6 Points and/or Line of Best Fit? Line of best fit - show points Determine if justified Experimental results - show points Determine quality of results Illustrating overall trend - points optional May complicate image Extrapolation - extending line beyond measured points 5 of 6 Error Bars Applied to averaged data e.g. bar chats/line graphs Represent either standard deviation or standard error Standard deviation - biological variability (ranges and variability) Standard error - size of uncertainty in mean (overlapping and size) 6 of 6
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