Descriptive statistics and nonparametric
statistics were used to analyze
data. A p value of less than or
equal to 0.05 was used to establish significance.
Sleep parameters of the T & A
post-operative sample and school
sample (N = 26) were compared using
the non-parametric Mann-Whitney U
test. This statistical test compares
measures of central tendency between
small groups (Pett, 1997).