https://communities.sas.com/t5/Statistical-Procedures/Statistical-tests-with-data-n-mean-and-std-values/m-p/70099#M3401 If I have a data describing different trials and for each trial I have: mean, std and number of considered events; how can calculate total mean, total std and further statistics tests (e.g. in a crossover design, ANOVA, ...).<BR /> <BR /> Example<BR /> <BR /> id mode sequence time reaction_mean reaction_std reaction_n<BR /> 111 TOT A 1 1.34 .03 5<BR /> 222 AXO B 2 0.3 1.5 2<BR /> 333 TOT A 1 5.3 0 1<BR /> ....<BR /> <BR /> And now I want to make the statistics of each mode: TOT, AXO, ... Tue, 23 Mar 2010 11:07:11 GMT deleted_user 2010-03-23T11:07:11Z https://communities.sas.com/t5/Statistical-Procedures/Statistical-tests-with-data-n-mean-and-std-values/m-p/70099#M3401 If I have a data describing different trials and for each trial I have: mean, std and number of considered events; how can calculate total mean, total std and further statistics tests (e.g. in a crossover design, ANOVA, ...).<BR /> <BR /> Example<BR /> <BR /> id mode sequence time reaction_mean reaction_std reaction_n<BR /> 111 TOT A 1 1.34 .03 5<BR /> 222 AXO B 2 0.3 1.5 2<BR /> 333 TOT A 1 5.3 0 1<BR /> ....<BR /> <BR /> And now I want to make the statistics of each mode: TOT, AXO, ... Tue, 23 Mar 2010 11:07:11 GMT https://communities.sas.com/t5/Statistical-Procedures/Statistical-tests-with-data-n-mean-and-std-values/m-p/70099#M3401 deleted_user 2010-03-23T11:07:11Z