Data are collected for one week.
Students toss an inflatable globe around the room.
Using the globe toss, look at different values obtained when students spin the ball during flight or toss it without spinning. By drawing slips of cards, flipping coins, or using a spreadsheet, random numbers can be generated to select sample points. Students each flip a coin, keeping the outcome secret. Then they answer the sensitive question or a non-sensitive alternative based on the result of the coin toss. A SRS helps avoid bias and distributes confounding variables uniformly among groups.