Hello! I've trying to estimate the SD of the difference between two means. I have the means, SD and n for each dataset. Below an example of how I have my dataset. I'd appreciate any help with this. Thanks! ages sex n mean A SD A mean B SD B Mean diff 19-30 males 882 7.45825 2.619444 6.2115 2.150556 -1.24675 19-30 females 897 5.58875 2.156296 4.666 1.774074 -0.92275 31-50 males 2077 7.591 2.546296 6.32325 2.089815 -1.26775 31-50 females 2288 5.83275 2.173704 4.86975 1.78963 -0.963 ... View more