抽样分配与点估计.ppt

社會統計;Sampling Theory and Some Important Sampling Distributions;Sampling Theory and Some Important Sampling Distributions;Sampling Theory and Some Important Sampling Distributions;Introduction to Sampling Distribution;Introduction to Sampling Distribution;Estimator and Estimate;Sampling distribution抽樣分配;Desirable properties of estimators;好的估計式必備條件?;Sampling Error抽樣誤差;Sampling Error抽樣誤差;Derivation of a Sampling Distribution抽樣分配;Derivation of a Sampling Distribution抽樣分配;Derivation of a Sampling Distribution抽樣分配;Derivation of a Sampling Distribution抽樣分配;Sampling Distribution;Sampling Distribution;Sampling Distribution;Sampling Distribution;Calculating E(X) and E(M);Biased and unbiased estimators;Relative Efficiency;高偏差低變異 高偏差高變異;低偏差高變異 低偏差低變異 ;Relative Efficiency;Relative Efficiency;Relative Efficiency;Minimum Variance Unbiased Estimator;Sampling Distribution of Sample Mean;Sampling Distribution of Sample Mean;Sampling Distribution of Sample Mean;無論母體為何種分配，樣本平均數的分配呈現鐘型且接近常態分配。而且當樣本數n愈大，趨近於常態分配的情形欲明顯。 X的抽樣分配其平均值等於母體平均數：;Very simple random sample (VSRS);Introduction to Sampling Distribution;;;Standard Error of X-bar;Small-population sampling;Small-population sampling;Standard Error of X-bar;例題;Variance of Discrete Random Variable;;圖3.1 某診所等待看牙時間(母體);圖3.2 等待看牙時間（樣本1，50人）; 圖3.3 等待看牙時間（樣本2，50人）;概念複習;估計誤差;估計誤差;簡單隨機抽樣;母體參數與樣本統計量;樣本平均數的抽樣分配;樣本平均數的抽樣分配;樣本平均數的抽樣分配;某國家五大區域過去一年的族群衝突次數;族群衝突次數的母體機率分配;樣本平均數的抽樣分配;樣本平均數的機率分配;族群衝突次數的抽樣;族群衝突的樣本平均數;族群衝突的抽樣分配;族群衝突抽樣分配圖;研究助理年資的機率分配圖;研究助理年資的樣本空間;研究助理年資的樣本平均數;研究助理年資的抽樣分配;研究助理年資抽樣分配圖;擲骰子出現點數的機率分配圖;擲骰子兩次的樣本平均數的機率分配;擲骰子兩次樣本平均數的機率分配圖;1-1;1-1;大數法則;圖9.16 大???法則;大數法則;圖9.16 X 的機率分配與 的抽樣分配;The Central Limit Theorem;圖9.18 中央極限定理母體分配 母體分配;圖9.18 中央極限定理（續）抽樣分配 抽樣分配;圖9.18 中央極限定理（續）抽樣分配 抽樣分配;表9.11 的抽樣分配;例題;例題;例題;例題;Sampling distribution of the difference between two sample mean;Sampling distribution of the difference between two sample mean;Sampling distributio