You are serving students to find out their opinion on the quality of food served in the school cafeteria. You decide to pull only the students to buy hot lunch any particular day. Is your simple random? Explain.

Answer 1

No, this is not a simple random sample because the sample is not being selected completely at random. Only students who decide to buy hot lunch on a particular day are being included in the sample, which could be biased towards students who prefer hot lunch or have a higher opinion of the cafeteria food. Additionally, the sample size and characteristics may vary depending on which day the survey is conducted. A more unbiased approach would be to randomly select a sample of students from the entire student population who have purchased lunch at least once in the cafeteria within the past month.