A factory has 20 assembly lines producing a popular toy. To inspect a representative sample of 100 toys, quality control staff randomly selected 5 toys from each line's output. Was this a simple random sample?
A) Yes, because each toy produced had an equal chance to be selected.
B) Yes, because a stratified sample is a type of simple random sample.
C) Yes, because the toys were selected at random.
D) No, because not all combinations of 100 toys could have been chosen.
E) No, because toys do not come off the assembly line at random.
Question 2
If we wish to compare the average PSAT scores of boys and girls taking AP Statistics at a high school, which would be the best way to gather these data?
A) observational study
B) SRS
C) experiment
D) stratified sample
E) census
Representative conifers
Representatives of many tomato lines
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Sample Stress Management Program
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A representative karyotype and a photograph of a child