Final answer:
Based on the provided list of competitive nations in 2010, Norway was not amongst the top 10, as it does not appear on the list.
Step-by-step explanation:
The question asks which country was not amongst the world's 10 most competitive nations in 2010. Based on the information provided, the competitive nations listed from one to twelve are Hong Kong, Singapore, New Zealand, Switzerland, Australia, Canada, Chile, Ireland, Estonia, United Kingdom, United States, and Denmark.
Since the United States is listed as the 11th, the United Kingdom as the 10th, and Singapore as the 2nd most competitive nation, the country not in the top 10 is Norway.