I am interested finding out how many times a month Nelson Elementary School children see their grandparents. At the school, 10% are kindergartners, 10% are 1st graders, 10% are 2nd graders, 10% are 3rd graders, 10% are 4th graders and 50% are 5th graders. I sample students until my sample matches these percentages. What kind of sampling is this? O expert sampling O quota sampling simple random samples Judgment sampling sample of convenience cluster samples systematic sampling haphazard selection stratified random samples I

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