The National Assessment of Educational Progress periodically administers tests on different subjects to high school students. In 2000, the grade 12 students in the sample averaged 301 on the mathematics test; the SD was 30. Can you say what the likely size of the chance error in the 301 is if a simple random sample of 1000 students was tested?
what the likely size of the chance error if a simple random sample?
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probability
statistics