"quantity"exercise: Hypothesis Testing

下载正保会计网校APP 订阅最新报考消息

来源: 正保会计网校编辑：小鞠橘桔 2020/09/09 16:28:09　字体：大小

学习是一个不断积累的过程，每天学习一点，每天进步一点！为了帮助大家更高效地备考2021年CFA考试，正保会计网校每日为大家上新CFA习题供大家练习。让网校与您一起高效备考2021年CFA考试，梦想成真！

Questions 1:

A parametric test is most likely preferred to a non-parametric test when:

A .the data are given in ratio or ordinal scale.

B .defined sets of assumptions are given.

C .the population is heavily skewed.

Questions 2:

The conditional expected value of a random variable is best described as the:

A .expected value of a random variable given an event or scenario.

B .probability-weighted average of the possible outcomes of the random variable.

C. weighted average of the probabilities of an event given all possible scenarios.

View answer resolution

【Answer to question 1】B

【analysis】

B is correct. A parametric test is more appropriate than a non-parametric one when an analyst is concerned with parameters whose validity depends on a definite set of assumptions—for example, assumptions about the distribution of the population producing the sample.

A is incorrect. A nonparametric test is suitable for this case.

C is incorrect. A nonparametric test is also suitable for this

【Answer to question 2】A

【analysis】

A is correct. The conditional expected value of a random variable is the expected value of a random variable given an event or scenario.

B is incorrect because an expected value (not a conditional expected value) is defined as the probability-weighted average of the possible outcomes of the random variable.

C is incorrect because an expected value is not a probability. This answer defines the total probability rule, which is the weighted average of the probabilities of an event given all possible scenarios

成功=时间+方法，自制力是这个等式的保障。世上无天才，高手都是来自刻苦的练习。而人们经常只看到“牛人”闪耀的成绩，其成绩背后无比寂寞的勤奋。小编相信，每天都在勤奋练习，即使是一点点的进步，大家一定可以成为人人称赞的“牛人”。

上一篇："quantity"exercise: Sampling

下一篇：CFA考试《定量方法》习题练习：时间加权收...