# Stats4 - Julio C Lopez MAST 6201 Homework Session#4 4.21 a...

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Julio C Lopez MAST 6201 4/16/2016 Homework Session #4 4.21) yes no 2009 39% 61% 1 2008 7% 93% 1 0.46 1.54 c. In part A we considered the comment event of Y in 2009 and in part B we considered the combined event of the two simple events Y & 2009. 4.25) male female total yes 238 276 514 no 304 267 571 total 542 543 1085 Depenedent from eachother 4.27) higher lower a. 73.77% higher 34 5 lower 11 11 b. 87.18% a. Pr(09|Y) 84% = .39/.46 = Pr (09 and Y)/Pr(Y) b. Pr(Y|09) 39% = .39/1= (Y and 09)/Pr(09) d. Since it's a join event, we have to consider the respondents. We're not clear that they need 3 or more clicks to remove from an email list and belong to the year 2009. a. Pr(F|NS) 49.17% b. Pr(M|ES) 46.30% c. 514/1085= 0.473732719 23.66% 238/1085 21.94%

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Julio C Lopez MAST 6201 4/16/2016 Homework Session #4 5.7) p x y 0.4 100 200 0.6 200 100 5.9) X is 0.4 E(X) E(Y) a. E(P) = \$80 50 100 VAR(X) Var(Y) b. portfolio risk \$102.17 9000 15000 5.17) probabilitycorporate common 0.01 -200 -999 0.09 -70 -300 c. From the data it is seen that the average price for the 1st five days that is 1/3/2012 to 1/6/2012 and 1/9/2012 is 1278.79. While the average pirice of the rest of the days for this year is 1381.41. This is greater than the weekely average price. Hence, we can conclude that
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• Spring '16
• Edward Fox
• Statistics, Homework, Null hypothesis, Harshad number, 175, Julio C Lopez

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