1) Not random. The sample is limited to customers in a computer shop, who may not represent the broader mall customer base.
2) Not random. Only listeners who choose to call in are surveyed, which skews results toward those with strong opinions or more free time.
3) Random. The 7th graders are selected randomly from the entire population of 7th graders.
4) Not random. Only students who buy from the vending machine at lunchtime are surveyed, excluding others and potentially biasing results toward certain habits.
5) Biased. It implies that salad is delicious and sandwich is “usual,” leading respondents toward salad.
6) Biased. The phrase “like everybody else” pressures respondents to conform, skewing results.
7) Fair. It asks a neutral, factual question without leading language.
8) Biased. The statement “I don’t like these shoes” influences the respondent to agree, making it leading.
Parent Tip: Review the logic above to help your child master the concept of random sampling worksheet.
