Begin by setting the level at which the hypothesiswill be tested. Most often we will use α = 0.05.• In a right-tailed test, if Ha is true (that is, M > M0),then we should observe more positive signs andfewer negative signs than expected. The teststatistic is S−, the number of negative signs. S−counts as evidence for H0, the null hypothesis. Isthere so little evidence for H0, that is, is S−sosmall, that we can safely reject H0?