A Feedback Approach for QoS-Enhanced MAC in Wireless Sensor Network

Algorithm 2

Hypothesis testing.

(1) Establishing the null hypothesis:

   There is no significant difference between and ,

   when system order changes form to ;

(2) Calculating statistics variable:

   From , we can get according to (15);

(3) Judgement:

   Chosen significance level , Searching critical value

   table for -test with freedom of and , that is,

(4) IF  , the null hypothesis can

   be accepted and rejected conversely.