Final answer:
The parameter of interest in the context of the question is the mean amount of extracurricular activities in which high school students participate.
Step-by-step explanation:
The parameter of interest in the context of the question is the mean amount of extracurricular activities in which high school students participate.
For example, in the given study, the parameter would be the mean amount of extracurricular activities in which all high school students participate, while the statistic would be the mean amount of extracurricular activities in which the sample of high school students participate.