Use the Following Data for the Next Questions

Short Answer

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.

-Identify the critical value T .