which technique is best to combine data from previous studies to make an overall statement? why do you have to collect data from previous studies? when is a meta-analysis necessary which type of analysis is a meta analysis of the data how to do meta analysis with original data can you combine the data from an experiment and run the analysis when is the cutoff point for combining data for a meta-analysis set when is a meta-analysis done when can i use data from previous experiments and combine them what is the difference between randomised ipd and metaanalyses when can you use individual participant data? what is it called if you have to combine data before doing an ipd when to do a meta analysis what is an example of a meta-analysis what is the cut off point of replication what is the best way to use data from previous studies why is it a good idea to combine data from previous studies when is the cutoff point for replication for a meta study set? what if we do not have initial data from all prior studies? why do you need to do a meta analysis if you don't have access to all data