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How to use "standard deviation" option in Y error bar menu?
Suppose I have some values and I compute the mean, which I plot in a bar
graph as one bar. Now, in the Format Data Series menu, under the Y error bar tab, I see the option of "Standard deviation" and "Standard error". I can't figure out how to use those; what I do now is put the stdev() of the values into a separate cell and use that cell in the "Custom" field of the Y error bar tab. But this must be the clumsy way of doing it, if it has "Standard deviation" and "Standard error" as built-in options. Presumably for it to use "Standard deviation" and "Standard error" it has to know (I have to select) the whole series of numbers, but then how do I tell it to plot the mean as the value of the bar itself? Thanks, Mike |
#2
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How to use "standard deviation" option in Y error bar menu?
I really don't know what the standard deviation or standard error are,
but they seem to be based on the values being charted. Use the custom error bar approach you're using. At least you know where the values come from. - Jon ------- Jon Peltier Peltier Technical Services, Inc. http://peltiertech.com/ On 4/22/2010 9:05 PM, Michael Levin wrote: Suppose I have some values and I compute the mean, which I plot in a bar graph as one bar. Now, in the Format Data Series menu, under the Y error bar tab, I see the option of "Standard deviation" and "Standard error". I can't figure out how to use those; what I do now is put the stdev() of the values into a separate cell and use that cell in the "Custom" field of the Y error bar tab. But this must be the clumsy way of doing it, if it has "Standard deviation" and "Standard error" as built-in options. Presumably for it to use "Standard deviation" and "Standard error" it has to know (I have to select) the whole series of numbers, but then how do I tell it to plot the mean as the value of the bar itself? Thanks, Mike |
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