题目
COMM_V 190 101-104 2025W1 2025W1 COMM 190 Final Exam - TUE Dec 09 2025 - Requires Respondus LockDown Browser
数值题
Let p=0.31 and q=0.81. Then, we we have E(X)=12.9, E(Y)=1.589, Var(X)=13.3651 and Var(Y)=60.59. What is E(4*X-9*Y)?
查看解析
标准答案
Please login to view
思路分析
To find E(4*X - 9*Y), we can use the linearity of expectation, which says that the expectation of a linear combination equals the corresponding linear combination of ex......Login to view full explanation登录即可查看完整答案
我们收录了全球超50000道考试原题与详细解析,现在登录,立即获得答案。
类似问题
The expected value of a "strange die" that has the values {2,3,4,6,7,8} the expected value is ... _________________________________________________________ in case you ask, a "normal" die is this, giving values 1 to 6.
Suppose Shristi owns a house that is worth $490,000 located in a fire hazard zone. There is a 2% (or 0.02) chance that her house will catch a fire in which case it will be completely destroyed (and 98% or 0.98 chance that it will remain intact). What is the expected value of her house?
Suppose you are offered a commission-based job that pays you 20% of your daily expected sales revenue. On any given day, there is an 80% chance you make $100 in sales and a 20% chance you make $1,000 in sales. What is your expected income for that day?
For some values of p and q, the payoff associated with sensing consolation is 250, and the payoff associated with sensing desolation is 200. What is the payoff associated with taking the personal retreat?
更多留学生实用工具
希望你的学习变得更简单
加入我们，立即解锁 海量真题 与 独家解析，让复习快人一步！