1. The problem asks to find the class boundaries for the class interval 5 – 15. 2. Class boundaries are the values that separate classes without gaps, usually found by averaging the upper limit of one class and the lower limit of the next. 3. For the class interval 5 – 15, the lower class boundary is found by subtracting half the unit of measurement from the lower limit: $$5 - \frac{1}{2} = 4.5$$ 4. The upper class boundary is found by adding half the unit of measurement to the upper limit: $$15 + \frac{1}{2} = 15.5$$ 5. Therefore, the class boundaries for the class interval 5 – 15 are $$4.5 \text{ to } 15.5$$.