Difference Test is used for examine two sample of comparative hypothesis which correlated if data have the shape of Ordinal. We must have done of normalitiy test to know data distribution before we done of difference test.If Data normal so you can using t test,if’nt wilcoxon test (Walpole, 1986).if our sample are difference subject so we can use compare mean by independent-sample T test, If our sample are same subject we can use compare mean by Paired Sampled T-Test.
Steps testing on t-test :
1.Hipotesis
H0 : µo = µ1 : There's not difference weight score before and after research
H1 : µo ≠ µ1 : There's not difference weight score before and after research
2.Determining of degree Significant
Degree significant has use is 5% or 0.05, with df = n-1
3.Comparism great probability by degree significant
if probability (sig) > 0.05 HO excapted
if probability (sig) <>
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