统计学之估计与置信区间(英文版)(ppt 74页)

统计学之估计与置信区间(英文版)目录：
一、GOALS
二、Point Estimates and Condence Intervals for a Mean
三、Population Standard Deviation (σ) Known
四、A confidence interval estimate
五、Finding z-value for 95% Confidence Interval
六、Point Estimates and Confidence Intervals for a Mean – σ Known
七、When to Use the z or t Distribution for Confidence Interval Computation
八、Student’s t-distribution Table
九、Confidence Interval for a Population Proportion
十、Self-Review
十一、Finite-Population Correction Factor
十二、CI For Mean with FPC - Example
十三、Selecting a Sample Size
十四、Another Example
十五、Chapter Summary

 

统计学之估计与置信区间(英文版)内容提要：
Factors Affecting Confidence Interval Estimates：
The factors that determine the width of a confidence interval are:
1.The sample size, n.
2.The variability in the population σ, usually estimated by s.
3.The desired level of confidence.

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