Скачать или смотреть Confidence Intervals or Interval Estimates for Means

Outlines how to compute an interval estimate/confidence interval for a sample mean, including brief review of the central limit theorem and brief introduction of the Student t-distribution. Shows how to calculate critical values t* using =T.INV.2T in Excel.

0:09 Introduction of Example
1:22 Review of Sampling Distribution/Central Limit Theorem
2:47 Introduction of the Student t-distribution
4:18 Point Estimate and Standard Error
5:56 Critical Value
10:10 Interval Estimate Formula and Final Calculation

For confidence intervals/interval estimates of a proportion, see this video:    • Confidence Intervals or Interval Estimates...  
For a discussion of point estimates vs. interval estimates, see this video:    • Point Estimates vs Interval Estimates  
For the central limit theorem about the sampling distribution of a sample mean, see this video:    • Central Limit Theorem (CLT) - Sampling Dis...