Quantity of statistical data, initially sufficient (5)
I believe the answer is:
ample
'sufficient' is the definition.
(both can mean enough)
'quantity of statistical data initially' is the wordplay.
I cannot quite understand how this works, but
'quantity' could be 'amp' (amp is a kind of quantity) and 'amp' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for ample that I've seen before include "Plentiful; large" , "Plenty, more than enough" , "Spacious" , "No more, please!" , "Buxom" .)