Estimation and Confidence Intervals

Properties of Good Estimators

Unbiasedness

Efficiency

Consistency

Concept of Confidence Intervals

Confidence Level vs. Confidence Coefficient

Margin of Error

Population Standard Deviation Known

Population Standard Deviation Unknown

Small Sample Considerations

Large Sample Approximation

Sample Size Requirements

Continuity Correction

Using Chi-Square Distribution

Common Misinterpretations

Relationship to Hypothesis Testing

Sample Size

Confidence Level

Population Variability

Properties and Characteristics

Degrees of Freedom

Comparison with Normal Distribution

When to Use t vs. z