stats week7

stats week7 - Sarah Anderson stats week 7 Exercise 4 (page...

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Sarah Anderson stats week 7 Exercise 4 (page 265) done Exercise 6 (page 270) DONE Exercise 12 (page 278) DONE Exercises 16, 18 (page 281) DONE 4.) a. Denker Brett, Wood Tom, Keisser Keith, Preist Harvey b. answers will vary c. Farley Ron, Hinckley Dave, Priest Harvey, Wood Tom 6.) With reposition. n = 2 a)(2,2), (2,2),(2,4), (2,4), (2, 8) (2,2), (2,2),(2,4), (2,4), (2, 8) (4,2), (4,2),(4,4), (4,4), (4, 8) (4,2), (4,2),(4,4), (4,4), (4, 8) (8,2), (8,2),(8,4), (8,4), (8, 8) Means 2, 2, 3, 3, 5 2, 2, 3, 3, 5 3, 3, 4, 4, 6 3, 3, 4, 4, 6 5, 5, 6, 6, 8 xmean(i). ..f(i) 2.............. 4 3.............. 8 4 . ............ 4 5 . ............ 4 6.............. 4 8.............. 1 n.............. 25 Xmean = (2*4 + 3*8 + 4*4 + 5*4 + 6*4 + 8*1)/25 = 4 Population mean = μx = (2 + 2 + 4 + 4 + 8)/5 = 4 V(X) = (2^2 + 2^2 + 4^2 + 4^2 + 8^2 - 5*4^2)/5 = 24/5 = 4.8 V(Xmean) = ((2^2)*4 + (3^2)*8 + (4^2)*4 + (5^2)*4 + (6^2)*4 + (8^2)*1 - 25*4^2)/25 = 12/5 = 2.4 The means are equals and V(Xmean) = V(X)/n, as established in the Central Limit Theorem.

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12.) Data: 2(5), 3(9), 4(3), 5(2), 7, n= 20
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This note was uploaded on 04/12/2011 for the course STAT 2610 taught by Professor Sanjeev during the Spring '11 term at Bemidji State.

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stats week7 - Sarah Anderson stats week 7 Exercise 4 (page...

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