MathBench > Statistics

Bar Graphs and Standard Error


For a scatterplot For a barchart
Choose x and y same!
Label x, y, and top same! (except x usually has no "units")
Decide minimums and maximums only for y -- and include the error bars
Decide distance for ticks only for y
Make a legend same
Add data! make rectangles, not dots

Choosing between SD and SE

How far members of the population deviate from the average  How far off your estimate of the mean is  
Quantifies the population Quantifies your experiment
Does NOT depend on sample size DOES depend on sample size (a lot!)
Use to characterize the population Use to test your results




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