Simplify the expression. Assume that the variable has positive values. 
Definitions:
Test Statistic
A value calculated from sample data during a hypothesis test used to decide whether to reject the null hypothesis.
Matched Pairs Differences
A statistical technique used to compare two measurements taken under similar conditions from the same or matched subjects.
Sign Test Statistic
The calculated value used in the Sign Test to determine the statistical significance of the observed data.
Distribution
Distribution in statistics refers to the way in which values of a variable or a set of data are spread or dispersed across a range.
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