Presentation is loading. Please wait.

Presentation is loading. Please wait.

Chapter 10 Hypothesis Tests with Two Independent Samples.

Similar presentations


Presentation on theme: "Chapter 10 Hypothesis Tests with Two Independent Samples."— Presentation transcript:

1 Chapter 10 Hypothesis Tests with Two Independent Samples

2 One Sample 男 女

3 比較男、女是否來自相同的 population 比較有錢、沒錢是否來自相同的 population 比較高、矮是否來自相同的 population 比較胖、瘦是否來自相同的 population 比有吃藥、沒吃藥是否來自相同的 population 比較本國人、外國人是否來自相同的 population 比較兩組人 ….. 比較 A & B 昰否來自相同的 population

4 Independent t test or Two mean t test Chapter 10

5 How about… 比較訓練前、訓練後是否一樣 ?( 來自相同的 population)? 比較減肥前、減肥後是否一樣 ? ( 來自相同 population)? 同一個人被比較兩次 ( 前 vs. 後 ) 用 independent t test? NO

6 Pair t test Chapter 11

7 How about… 比較 A 、 B 、 C 是否來自相同的 population? For example 比較大二、大三、大四學生實習滿意度是 否一樣 ? ( 來自相同的 population)

8 Analysis of Variance (ANOVA) 變異數分析 (chapter 13)

9 Independent t test Independent t test = 兩獨立樣本檢定 Independent-measure t test = Two mean t test Goal: to evaluate the mean difference between two population (  1 vs.  2 ) 無法得知  1 &  2 所以用什麼取代 ?? Independent-measure t test vs. repeated- measure t test

10 Process Step 1: hypothesis Step 2:locate the critical region (tc) Step 3: 計算 to Step 4: make a decision

11 Process Step 1: hypothesis – Ho:  1 -  2 =0 (no difference between the population means) – H1:  1 -  2 >,<,≠ 0 Step 2:locate the critical region (tc) – df= df1 + df 2 = (n 1 -1)+ (n 2 -1)=(n 1 +n 2 )-2 – 從 hypothesis 決定單雙尾 –  level

12 Step 3: 計算 to Two sample Standard error  1-  2=0 Pooled variance

13

14

15 Step 3: 計算 to Step 4: make a decision

16


Download ppt "Chapter 10 Hypothesis Tests with Two Independent Samples."

Similar presentations


Ads by Google