4  Margin of Error

4.1 Importance of Sample Size

4.2 Factors Affecting Sample Size

4.3 Determining the Right Sample Size

4.4 Margin of Error Explained

4.5 Confidence Level & Its Impact

4.6 Calculating Sample Size

4.7 Impact of Small vs. Large Samples

4.8 Balancing Accuracy & Cost

4.9 Sample Size in Different Sampling Methods

4.10 Real-World Examples