What is one advantage of studying larger-sized samples?

• A. They are cheaper.
• B. They require less data processing.
• C. They are usually more representative of the population as a whole.
• D. They yield exactly identical results every time.

Answer: (C)

The key idea is that bigger samples make findings more representative of the whole population because sampling error shrinks as sample size grows. As you collect more data, the sample average or proportion tends to get closer to the true population value, a consequence of the law of large numbers. This means the estimates become more precise and the results generalize better to the population. The other options don’t fit: larger samples are not cheaper and typically require more data processing, and even very large samples won’t yield exactly identical results every time due to random variation and measurement noise.