2004-Fall-Midterm_s

2004-Fall-Midterm_s - More PastPaper:...

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Unformatted text preview: More PastPaper: http://ihome.ust.hk/~cs_gxx Numerical Answers of Mid-term Exam 2004 Question 1 (b) 86.24. (c) i. 0.258 ii. P{R = 33000}= Pr{X≤85}= 0.258 P{R = 32000}= Pr{X=86}= 0.269 P{R = 31000}= Pr{X=87}= 0.304 P{R = 30000}= Pr{X=88}= 0.169 iii. 31616.5 Question 2 (a) i. 0.4 ii. E(X)= 69,300,000 (b) i. 0.0129 ii. E(X)= – 8 ,120,000 iii E(X)= –700,000 (c) E(Consult)= 15,050,000 E(Not Consult)= 10,000,000 Question 3: 0.3333 0.375 0.5 0.7222 k/ ~c s_ gx x/ (b) (c) (d) (e) :// ht tp (d) The combined sample mean is 5.0217. ih om e. us t.h Question 4: (a) The sample mean is 5.3689 The sample variance is 6.0405. 5 More PastPaper: http://ihome.ust.hk/~cs_gxx The sample standard deviation is 5.7133. ht tp :// ih om e. us t.h k/ ~c s_ gx x/ Question 5: (a) 0.15 (b) 0.3333 (c) (i) 0.51108 (or 0.5120) (ii) The ‘cut loss’ value b is -3.64%. 6 ...
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