To see Demos on how to make this graphs, click on the links below:

Insert the XY (scatter plot) http://www.youtube.com/watch?v=z4Ch6_ghJk4 Movie MP4(HD)
Plot the means head circumference of the boys and girls (2 series) http://www.youtube.com/watch?v=od3nCzA1ISM Movie MP4(HD)
Write the axises and the graph titles http://www.youtube.com/watch?v=JvUus17T2Fs Movie MP4(HD)
Oups! I forgot the minus in + http://www.youtube.com/watch?v=5z0epyCPKT8 Movie MP4(HD)
Re-scale the axes http://www.youtube.com/watch?v=jrr6XL4_ACQ Movie MP4(HD)
Color codes the data points and the lines of the 2 series boys and girls http://www.youtube.com/watch?v=rU3Y2QiSprs Movie MP4(HD)
Plot the confidence intervals http://www.youtube.com/watch?v=NY2uEMxasG0 Movie MP4(HD)
Prettify and remove the border around the graph http://www.youtube.com/watch?v=mWpP_dp43iY Movie MP4(HD)
Color code the error bars http://www.youtube.com/watch?v=AyxCMPtpIsM Movie MP4(HD)