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What would be an appropriate way to estimate the proportion of students at your school who are in favor of starting classes after Labor Day?

Calculate the mean number of students who are in favor in a random sample from all students at my school.

Calculate the proportion of students who are in favor in a sample of my friends.

Calculate the proportion of students who are in favor in a sample of students in my class.

Calculate the proportion of students who are in favor in a random sample from all students at my school.