Assignment2 stat2023

# Assignment2 stat2023 - Patricia Ade Assingment2 Chapter 4:...

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Patricia Ade 03/05/08 Assingment2 Chapter 4: Sect. 4.1 – 4.2 Sect. 4.2 – 4.12, 4.16, 4.21 Sect. 4.3 – 4.40, 4.45, 4.47 Sect. 4.4 – 4.57, 4.61, 4.65 Sect. 4.7 – 4.97, 4.100, 4.101, 4.103 Sect. 4.11 – 4.151, 4.154 Review – 4.184 Chapter 4 – Section 4.1 4.2 a) The closing price of a particular price of a particular stock on the xNew York Stock Exchange is random discrete variable. b) The number of shares of a particular stock that are traded each business day is a random discrete variable. c) The Quarterly earnings of a particular firm is a random discrete variable. d) The percentage change in yearly earnings between 2006 and 2007 for a particular firm is a random continuous variable. e) The number of new products introduced per year by a firm is a random discrete variable. f) The time until a pharmaceutical company gains approval from the U.S. Food and Drug Administration to market a new drug is a random continuous variable. Section 4.2

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Random variable a) The value x may assume these variable: 1, 2, 3, 5, 7, 9 b) The value of 5 is most probable c) 0.4 0.3 0.2 0.1 0.0 0 1 2 3 4 5 6 7 8 9 d) P(x+7)=.2 e) P(x 5)=p(5)+p(7)+p(9)=.4+.2+.1=.7 f) P(x>2)=p(3)+p(5)+p(7)+p(9)=.2+.4+.2+.1=.9 4.16 Random Variable a) μ =E(x)= xp(x)=10(.05)+20(.20)+30(.30)+40(.25)+50(.10)+60(.10)=. 5+4+9+10+5+6=34.5
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## This note was uploaded on 04/15/2008 for the course STAT 2023 taught by Professor Bekker during the Spring '08 term at FIU.

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Assignment2 stat2023 - Patricia Ade Assingment2 Chapter 4:...

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