Get function to go through each individual group in data set instead of the whole dataset,

Question

My function goes through a list of datasets and returns the p value, statistic and ci. How can I make it run through all the individual datasets in a list instead of calculating the statistics for all of the list.

I have FindOST(listofdatas[1:5000],2,alt = "two-sided",.95) but it does not help

it gives a an average of all the listofdats