?? ????? ??????? ????? ?? ????? ??? ((Sn, ?????? ?? ????? ???? ???? ???? ?????? ???? ?? ?????????? ???? ????? ??????? (?). - PowerPoint PPT Presentation

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About This Presentation
Title:

?? ????? ??????? ????? ?? ????? ??? ((Sn, ?????? ?? ????? ???? ???? ???? ?????? ???? ?? ?????????? ???? ????? ??????? (?).

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Title: PowerPoint Presentation Author: rico Last modified by: stat Created Date: 12/11/2003 1:04:05 PM Document presentation format: – PowerPoint PPT presentation

Number of Views:63
Avg rating:3.0/5.0
Slides: 19
Provided by: rico92
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Tags: guinness

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Transcript and Presenter's Notes

Title: ?? ????? ??????? ????? ?? ????? ??? ((Sn, ?????? ?? ????? ???? ???? ???? ?????? ???? ?? ?????????? ???? ????? ??????? (?).


1
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2
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?? ????? ??????? ????? ?? ????? ??? ((Sn, ??????
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???? ????? ??????? (?).
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applet
3
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4
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5
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6
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7
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???? ?????? ???? ?? ??????? ?????? ???? ?????
????.
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???? ????????? ????????. ??????? ??? ?????
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????
t ???? ????? ??????? ??? ????? t ???? ???????
???? ????. ???? ??? ??????? t ??? ???? ????? ??
????????? ???????? ?? ????? ????? (?"?d.f.n-1)
??? ????? ??????? ???? ????, ?? ?????? ???? (s)
????? ???? (???? ???? ?-?) ???????? t ??? ????
?????? ????????.
William Gosset Students t
??? dfn-1?
Guinness's brewery
8
(No Transcript)
9
????????? ????? ?? ???????
???
????? t?
  1. ???? x ????? ???????
  2. ?? ???? ngt30

10
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?????? ?? ????? ??? ?????? ?? z.
1)
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2) ????? x ????? ???????, ?? ngt30. 3) ?????
???????? 4) ?????? ???????? t ???? ??????
?????, ?? ????? p ??????? EXCEL
???? ????? ??????? ????!
NORMSDIST ? ? TDIST? 1-?
11
(No Transcript)
12
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???? ??????? ??????? ?? ????? ??????? ??? 6500 ?
. ????? ????? ????? ???? (???? ????? ???????)
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???? ??????? ?? 0.05?
1)
2)
????? ? ngt30, ??????? ?????? ??? t.
3)
????
???? ?????? ???? ?0.05 ??-???? ?? df39 ???
1.697(??? ?????)
4)
??? ???? ????? ?? H0 ????? ??????? ???.
TDIST(4.52,39,1)2.8E-05
13
5) ??? ????? ????? ????? ?????? ?? ????? ????
????? ????? ???????? ?????? 6900 ??
TINV(0.1,39)1.68
???? ??! ?????? ??? ??-?????, ??? ?????? ??-?????
?? ?????? ?? ? ?-2.
0.03TDIST(1.93,39,1)
14
?? ??? ?????? ?? Sn, ????? ?
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15
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TINV(?,df)
????? ????? ????? n30 ???? ??????? ??????? ????
4000 ?? ????? ?????? ???? 0s300. ???? ????? ??
95 ((?0.05, ??? ????? ?????? ?? ??? ???????????
2.045(TINV(0.05,29
16
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???? 10 ?????? ?"?. ????? ?????? ????? ???????
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95? ???? ??????? 70,60,80,90,60,73,76,81,90,65.
?? ????? ?-n ??????? ???????? t ???? ??????
?????? ????????.
17
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18
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