Quiz

What happens when a sample does not accurately represent the entire population?

• It leads to precise results.

• It causes sampling error.

• It improves research quality.

• It eliminates bias.

Which factor is crucial for determining the margin of error in research?

• Standard deviation

• Confidence level

• Sample size

• Population size

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What does Cochran's formula help researchers calculate?

• Confidence level

• Margin of error

• Sample size

• Population size

In a study with a 95% confidence level, what z-value is typically used?

• 2.58

• 1.28

• 1.96

• 1.64

What does Yamain's formula use to determine sample size?

• Standard deviation and margin of error

• Sample size and confidence level

• Population size and precision level

• Population size and error tolerance