1. Stating the problem: Calculate the value of $h$ in a sign test where the number of positive signs is 25 and the number of negative signs is 6. 2. Formula used: In a sign test, $h$ is the smaller of the two frequencies (positive or negative signs). 3. Given data: Number of positive signs $= 25$, number of negative signs $= 6$. 4. Calculation: $h = \min(25, 6) = 6$. 5. Explanation: The sign test uses the smaller frequency to determine the test statistic $h$. 6. Final answer: $h = 6$.