Answer:
To calculate the sample proportion of HCC students who smoke, you divide the number of students who smoke (9) by the total sample size (40). The sample proportion (p) can be calculated as:
p = Number of students who smoke / Total sample size
In this case:
p = 9 / 40
p ≈ 0.225
Therefore, the sample proportion of HCC students who smoke is approximately 0.225, or 22.5% (when expressed as a percentage).