Statement:
Sudan has a lower Human Development Index than Tonga

In the Human Development Index rating Sudan holds position #168 ²⁰²¹ out of 187 and Tonga is #94 out of 187 ²⁰²¹.
Position of Sudan is worse than position of Tonga.

Referencies:

1. Human Development Index ²⁰²¹ by United Nations

   The countries in the rating sorted by 'Human Development Index' in descending order.

   Sudan	'Human Development Index' value is	0.51
   Tonga	'Human Development Index' value is	0.74