Chapter 10 Hypothesis Tests with Two Independent Samples

Chapter 10 Hypothesis Tests with Two Independent Samples

One Sample 男 女

Independent t test Two mean t test Chapter 10 or

Pair t test Chapter 11

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

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. repeatedmeasure t test

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

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

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

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