2 MEMO - Semester test PDF

Title	2 MEMO - Semester test
Course	Statistics
Institution	University of the Free State
Pages	6
File Size	155.3 KB
File Type	PDF
Total Downloads	111
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Summary

Semester test...

Description

Test 2 Memo

(

X N ( μ=70 ; σ =3 ) ; n=36 ; Then X´ N μ=70;

1.

σ 1 = √n 2

)

P ( X´ >71 ) =

(

P Z>

71−70 0.5

)

¿ P ( Z >2 )=1−P ( Z< 2) =1−0.9772=0.0228

2.1

X N ( μ=3.26 ; σ =1.2 ); n=100 ;

(

´ N μ=3.26 ; Then X

σ 1.2 = √ n 10

)

P ( X´ >3.5 )

(

P Z>

3.5−3.26 0.12

)

P ( Z >2)=1 −P ( Z...