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第八章 均值之差的推断 PowerPoint PPT Presentation


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第八章 均值之差的推断. 本章内容 8.1 两个总体均值之差推断的基本内容 8.2 独立样本均值之差检验 8.3 两总体方差差异检验 8.4 成对样本推断. 下一页. 返回目录. 8.1 两个总体均值之差 推断的基本内容. 8.1.1 两个总体均值之差的抽样分布 8.1.2 三种检验情况 8.1.3 Excel 双样本检验分析工具的内容. 上一页. 下一页. 返回本章首页. m. x. 2. 8.1.1 两个总体均值之差的 抽样分布. 假定从总体 1 中抽取一个随机样本,从总 体 2

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第八章 均值之差的推断

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  • 8.1

  • 8.2

  • 8.3

  • 8.4

8


8.1

  • 8.1.1

  • 8.1.2

  • 8.1.3 Excel

8


m

x

2

8.1.1

  • 1 2

  • 5 =1=2

8


8


s

s

2

s

2

2

-

x

x

1

1

2

  • =

8


  • n1+n2-2tt

8


1

1

-

+

s

2

(

x

x

)

t

n

p

n

a

1

2

2

1

2

8


8.1.2

  • Excel

8


1.

  • z

    2

  • t

  • tn1n2-2n1n2

8


3

  • -

  • tt

  • Excelt Stat

  • tP

8


8.1.3 Excel

  • F-

  • t-

  • t-

  • t-

8


8


  • 1

  • 2

  • 0

8


  • Excel

  • a I 0~1

  • Excel

8


  • A1

8


8.2

  • 8.2.1

  • 8.2.2

  • 8.2.3

8


8.2.1

  • 12

  • 0.05

8


1

  • 12

8


8 .xls

8


8


t

8


1A1:A13

2B1:B13

00.05D1

8


8.2.2

  • H195%

    H4

    t

8


I4=E4-F4

I5=(I4-E8)/E10

8


I6=TINV(0.05,E9)

t

I7=I6*I5

I8=I4-I7

I9=I4+I7

  • 161~640495%

8


8.2.3

  • 0.05?

8


  • Ho

  • Ha

  • >

  • 8 .xls

8


1.

  • t

  • t

8


1 A1:A23

2 B2:B13

0

8


C1

8


47.552.41P

P.0.051746(0.05)0.05

8


t1.6938t

8


2

  • Excelt-

    tt

8


1 A1A23

2 B2B13

0

G1

8


  • P0.0257833290.05tt0.05

8


8.3

    • Ho2=2

    • Ha22

  • F

8


8 .xls FF

8


1A1:A232B1:B130.05Excel0.05

C30C30

8


C39E39

8


C39PD39=D38*20.017676129

  • P5%2%8.2

8


  • 199446%200548%

  • 0.05

8


8 .xls

8


1 A1A66

2 B2B66

0

D2

8


8


  • :

  • 625.6494.3

  • t1.65t3.462P0.000760.05

8


8.4

  • 8.4.1

  • 8.4.2

  • 8.4.3

8


8.4.1

  • 1 = 2Ho: 12 =0d=x-yd~n(, s2)D=0

8


8.4.2

8


  • 6

  • 0.05

8


Ho Ha

  • Ho=0=0Ho00Ha00

8


8 .xls

8


C1C2=A2-B25,759C2C3:C13

B14B15B16B17tB18P

C14=AVERAGE(C2:C13)C15=STDEV(C2:C13)30924471.701

8


C16=C15/SQRT(12)

C17=C14/C16 t

C18=TDIST(ABS(C17),11,1) P0.01777

  • P

8


8.4.3

  • ExcelExcel

8


8 .xls

8


t

8


1A1:A13

2B1:B13

0

0.05Excel0.05

D1D1

8


8


  • tPttP

8


Thank you very much!

8


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