Quiz, answers PDF

Title	Quiz, answers
Course	Statistics for Business
Institution	Western Sydney University
Pages	1
File Size	73.4 KB
File Type	PDF
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Summary

quiz assessment 1...

Description

WEEK5‐TOPIC5 DiscreteProbabilityDistributions‐Individual 

7.20  7.58a 7.69c

  

page266 page288 page294

  7.20 (4marks)  X=x

P(X=x)

x.p(x)

x².p(x)

0

0.10

0.00

0.00

1

0.25

0.25

0.25

2

0.40

0.80

1.60

3

0.20

0.60

1.80

4

0.05

0.20

0.80

1.85

4.45

 a) µ=1.85 2marks  b) σ²=4.45–1.85²=1.0275 2marks   7.58a (3marks)  LetX=no.ofseedsthatgerminate  X~Bin(n=25,p=0.9)  a) P(x=20)=P(x≤20)–P(x≤19)=0.098–0.033=0.065 3marks   7.69c (3marks)  LetX=no.ofusersofanATM  X~Poisson(µ=1.5per5mins.)  3marks c) P(x≥3|µ=3)=1–P(x≤2|µ=3)–1–0.4232=0.5768

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200032STATISTICSFORBUSINESS 

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