Question

question 5 (multiple choice worth 2 points) (05.01r) (05.01) how can you decrease the variability in a sample poll? increase the sample size decrease the sample size increase the bias decrease the bias none of the above

Explanation:

In sampling, variability (or sampling error) is related to how spread out sample statistics are. Increasing the sample size makes the sample more representative of the population, reducing the variability. Decreasing sample size would increase variability. Bias is about systematic error, not variability, so changing bias doesn't affect variability. Thus, increasing sample size decreases variability.

Answer:

A. Increase the sample size