Use the following data for the next questions. Researchers studying sleep loss followed the length of sleep, in hours, of 10 individuals with insomnia before and after cognitive behavioral therapy (CBT). Use the Wilcoxon Signed-Ranks Test with a .05 significance level to test the claim that both samples come from populations having differences with a median equal to zero. -State a conclusion about the null hypothesis and a final conclusion that addresses the original claim.