Statement:
In Australia, mobile Internet is on average less expensive than in Afghanistan

In the Most expensive mobile internet rating Australia holds position #135 ²⁰²² out of 204 and Afghanistan is #120 out of 204 ²⁰²².
Position of Australia is better than position of Afghanistan.
Both countries holds average positions in the "Most expensive mobile internet" rating. So Average price of 1GB (USD) is an average for both Australia and Afghanistan, compared to most countries of the World.

Referencies:

1. Most expensive mobile internet ²⁰²² by cable.co.uk

   The countries in the rating sorted by 'Average price of 1GB (USD)' in descending order.

   Afghanistan	'Average price of 1GB (USD)' value is	0.90
   Australia	'Average price of 1GB (USD)' value is	0.57