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标题: [2008 CFA level 1模拟真题]Version 1 Questions－Q10 [打印本页]

作者: 8586 时间: 2008-5-17 18:16 标题: [2008 CFA level 1模拟真题]Version 1 Questions－Q10

10、Which of the following changes in sample size and degrees of freedom, respectively, is most likely to result in an increase in the width of the confidence interval for the population mean?

Sample size

Degrees of freedom

Increase

Decrease

Increase

Decrease

A. Answer A

B. Answer B

C. Answer C

D. Answer D

作者: 8586 时间: 2008-5-17 18:17 标题: 答案和详解回复可见:

Correct answer = D

"Sampling and Estimation," Richard A. Defusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. Runkel
2008 Modular Level I, Vol. 1, pp. 440-441
Study Session 3-10-j
calculate and interpret a confidence interval for a population mean, given a normal distribution with 1) a known population variance, 2) an unknown population variance, or 3) an unknown variance and a large sample size
The standard error becomes smaller as the sample size increases. An increase in sample size increases degrees of freedom, reducing the reliability factor. A reduction in both the standard error and the reliability factor decrease the width of the confidence interval. A decrease in both would increase the width.

作者: cxz0858 时间: 2008-5-19 22:25

A

作者: rwangy 时间: 2008-5-23 23:54

3x

作者: zjy1228 时间: 2008-5-24 00:07

thanks

作者: zhangxie83 时间: 2008-5-29 23:47

c

作者: Riverview 时间: 2008-5-30 04:13

thanks

作者: 刀剑如梦 时间: 2008-5-31 01:23

thanks

作者: gening 时间: 2008-6-1 06:06 标题: thanks!

thanks!

作者: 盛夏的果实 时间: 2008-6-1 14:13

thanks

作者: isaisaisa 时间: 2008-6-2 20:23

d

作者: oleander 时间: 2008-6-3 04:12

a

作者: clover 时间: 2008-6-5 16:32

d

作者: vivivin 时间: 2008-6-20 13:09

re

作者: 小麦 时间: 2008-6-21 12:07

[em01]

作者: Allenliu 时间: 2008-6-23 17:36

[em02]

作者: lucylu 时间: 2008-7-31 11:50

thanks

作者: yiran66 时间: 2008-8-14 10:43

[em06]

作者: gwkl 时间: 2008-8-14 11:09

thx

作者: sharonshen 时间: 2008-8-14 21:54

[em02]

作者: liyuncca 时间: 2008-8-23 14:20

thanks

作者: zhuce 时间: 2008-9-19 04:35

thANKS

作者: 小candy 时间: 2008-9-26 15:22

thx

作者: AtTRV2008 时间: 2008-9-27 08:54

Thanks!

作者: elea0930 时间: 2008-10-8 23:36

c

作者: stanleymyc 时间: 2008-10-11 21:49

ding

作者: myguitar33 时间: 2008-10-20 11:32

good

作者: miaka227 时间: 2008-11-22 14:35

thx

作者: diangdiang 时间: 2008-12-4 12:53

d

作者: 1001night 时间: 2008-12-6 17:25

[em01]

作者: johnheman 时间: 2009-2-23 17:15

OK, take a .....

作者: xxjj564 时间: 2011-3-18 12:38

 a

作者: xiangzhj 时间: 2011-6-3 12:31

thanks

作者: taurencfa 时间: 2011-6-27 17:50

you got me

作者: ferny 时间: 2011-7-1 18:17

答案来

作者: reuter23 时间: 2011-7-8 08:26

thx thx他、

作者: ellazyh 时间: 2011-7-9 17:06

may I have a look, thanks

作者: wangasas82 时间: 2011-7-13 11:34

好东西一定要顶

作者: tiger1346 时间: 2011-7-16 23:04

学习一下

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