Statement:
An average person in Sri Lanka drinks less alcohol than in Sierra Leone

In the Alcohol average daily consumption rating Sri Lanka holds position #87 2016 out of 189 and Sierra Leone is #53 out of 189 2016.
Position of Sri Lanka is better than position of Sierra Leone.
Both countries holds average positions in the "Alcohol average daily consumption" rating. So Both sexes is an average for both Sri Lanka and Sierra Leone, compared to most countries of the World.

Referencies:

  1. Alcohol average daily consumption 2016 by WHO
    The countries in the rating sorted by 'Both sexes' in descending order.
    Sierra Leone 'Both sexes' value is 39.5
    Sri Lanka 'Both sexes' value is 32.2