新用戶掃碼下載
掃碼下載APP
及時接收最新考試資訊及
備考信息
"quantity"exercise: A nonparametric test
學習是一個不斷積累的過程，每天學習一點，每天進步一點！為了幫助大家更高效地備考2021年CFA考試，正保會計網校每日為大家上新CFA習題供大家練習。讓網校與您一起高效備考2021年CFA考試，夢想成真！
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=時間+方法，自制力是這個等式的保障。世上無天才，高手都是來自刻苦的練習。而人們經常只看到“牛人”閃耀的成績，其成績背后無比寂寞的勤奮。小編相信，每天都在勤奮練習，即使是一點點的進步，大家一定可以成為人人稱贊的“牛人”。更多CFA考試資訊，點擊了解>
學員討論（0）
推薦閱讀
新用戶掃碼下載
京公網安備 11010802044457號
