1. **State the problem:** We want to find the percentage of band members who practice their instruments less than 20 minutes per day based on the sample data. 2. **Understand the data:** The dot plot shows the number of band members practicing at different times: - 1 member at 10 minutes - 2 members at 15 minutes - 5 members at 30 minutes - 1 member at 40 minutes - 1 member at 50 minutes - 3 members at 60 minutes 3. **Identify members practicing less than 20 minutes:** These are the members at 10 and 15 minutes. - Total members practicing less than 20 minutes = 1 + 2 = 3 4. **Total sample size:** 20 members 5. **Calculate the percentage:** $$\text{Percentage} = \left(\frac{\text{Number practicing less than 20}}{\text{Total sample}}\right) \times 100 = \left(\frac{3}{20}\right) \times 100$$ 6. **Simplify the fraction:** $$\frac{3}{20} = 0.15$$ 7. **Calculate the final percentage:** $$0.15 \times 100 = 15\%$$ **Answer:** About 15% of all band members practice their instruments less than 20 minutes per day.