error bars.. ?

[charleyy !]

can anyone help me ??! doing these graphs for science coursework.. what are error bars ?

[Bev2007]

To understand what they are see wikipedia. http://en.wikipedia.org/wiki/Error_bars

To know how to put them on a chart in excel see Excel help menu (search for error bars)

Good luck..

[charleyy !]

cheers ! : )