Sign Test for the Differences 口 Hypotheses Probability of Probability of That is, the probability of going up equals the probability of going down H: Probability of xr is to Probability of X>H That is, the probability of going up and down are unequal 口 Assumption o The data set is a random sample from the population of interest and each elementary unit in the sample has both values X and y measured for itSign Test for the Differences  Hypotheses H0 : Probability of X < Y equals Probability of X > Y That is, the probability of going up equals the probability of going down H1 : Probability of X < Y is not equal to Probability of X > Y That is, the probability of going up and down are unequal  Assumption ⚫ The data set is a random sample from the population of interest and each elementary unit in the sample has both values X and Y measured for it