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Seventh grade math 10. 1 census and sampling survey questions
Overall: the math scores of 70 thousand students

The sample is: 1000 students' math scores.

Individuals are: 1 students' math scores.

Sample size: 1000 students.

Total: service life of a batch of bulbs: 1 bulb sample: 10 bulbs.

Sample size: 10 bulbs

Total: Number of people entering the park every day: 1 day. Number of people entering the park every day: 30 days.

Sample size: 30 days

Hope to be adopted

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