Reading 8: Probability Concepts-LOS b习题精选 - Quantitative - 【CFA一级试题精选】 - CFA论坛

Rank: 4

UID: 137541
帖子: 3658
主题: 530
注册时间: 2009-7-1
最后登录: 2012-2-18

11^# 跳转到 »

发表于 2010-4-12 13:46 | 只看该作者

Which of the following sets of numbers does NOT meet the requirements for a set of probabilities?

A)	(0.10, 0.20, 0.30, 0.40, 0.50).

B)	(0.50, 0.50).

C)	(0.10, 0.20, 0.30, 0.40).

Rank: 4

UID: 137541
帖子: 3658
主题: 530
注册时间: 2009-7-1
最后登录: 2012-2-18

12^#

发表于 2010-4-12 13:47 | 只看该作者

Which of the following sets of numbers does NOT meet the requirements for a set of probabilities?

A)	(0.10, 0.20, 0.30, 0.40, 0.50).

B)	(0.50, 0.50).

C)	(0.10, 0.20, 0.30, 0.40).

A set of probabilities must sum to one.

Rank: 4

UID: 137541
帖子: 3658
主题: 530
注册时间: 2009-7-1
最后登录: 2012-2-18

13^#

发表于 2010-4-12 13:50 | 只看该作者

Which of the following is an empirical probability?

A)	For a stock, based on prior patterns of up and down days, the probability of the stock having a down day tomorrow.

B)	The probability the Fed will lower interest rates prior to the end of the year.

C)	On a random draw, the probability of choosing a stock of a particular industry from the S& 500 based on the number of firms.

Rank: 4

UID: 137541
帖子: 3658
主题: 530
注册时间: 2009-7-1
最后登录: 2012-2-18

14^#

发表于 2010-4-12 13:51 | 只看该作者

Which of the following is an empirical probability?

A)	For a stock, based on prior patterns of up and down days, the probability of the stock having a down day tomorrow.

B)	The probability the Fed will lower interest rates prior to the end of the year.

C)	On a random draw, the probability of choosing a stock of a particular industry from the S& 500 based on the number of firms.

There are three types of probabilities: a priori, empirical, and subjective. An empirical probability is calculated by analyzing past data.