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       <dc:date>2026-04-17T11:02:03+00:00</dc:date>
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Week01 (March 5, 7)

ideas and concepts

Introduction to the class

	*  Install R in your class computer 
		*  Refer to this page


리서처는 젊은이와 (Younger Adults) 중년층의 (Older Adults) 개인간에는 생에 대한 만족도에 차이가 있을 것이라고 생각하고 이를 검증하는 테스트를 진행하려고 한다. 사전 리서치 결과 Life satisfaction을 측정하는 테스트가 있다는 것을 파악하고 이를 사용하기로 하였다. $ \mu = 50, \sigma = 10 $$ \hat{Y} = a + b X $$b = {SP} / {SS_{X}}$$a = \overline{Y} - b {\overline{X}}$$\text{F test} = MS_{\text{regression}} / MS_{\text{total}} $$\text{df}_{\text{regr…</description>
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        <description>example 1

Older Adults	Younger Adults
45	34
38	22
52	15
48	27
25	37
39	41
51	24
46	19
55	26
46	36
Mean =	Mean =
S =	S =
S2 =	S2 =


e.g. 2

Obs #	Salary	GPA	Months Work
1	20000	2.8	48
2	24500	3.4	24
3	23000	3.2	24
4	25000	3.8	24
5	20000	3.2	48
6	22500	3.4	36
7	27500	4	20
8	19000	2.6	48
9	24000	3.2	36
10	28500	3.8	12</description>
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