Ask your own question, for FREE!
Mathematics 44 Online
OpenStudy (anonymous):

X1,...,X64 are identically distributed independent random variables such that E(Xi)=3.1 and Var(Xi)=9. What is the standard deviation of their average? In other words, what is the standard deviation of X= (X1+...+X64)/64 ?

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Latest Questions
emmarose: What is your earliest childhood memory?
15 hours ago 5 Replies 0 Medals
emmarose: what are y'all's opinion on squirrels
16 hours ago 13 Replies 0 Medals
CecePitbull: I made this for my wonderful husband what do yall think?ud83dude17 (was lwk panic
9 hours ago 24 Replies 5 Medals
Rosa2011: It's my birthday, what usually y'all doing on your birthdays
9 hours ago 25 Replies 4 Medals
Skyler14: we just got a new puppy
5 hours ago 12 Replies 1 Medal
XxXGhostXxX: what is some good songs i should listen to?
3 hours ago 53 Replies 2 Medals
Twaylor: For reasons undisclosed to the public as it'd ruin the puzzle, I must send it as a google document.
16 hours ago 6 Replies 0 Medals
Twaylor: Car addon idea: Slider to adjust lights brightness Thoughts?
1 day ago 1 Reply 0 Medals
75: if my dog bites the living hell out of me, can i hit it?
2 days ago 4 Replies 0 Medals
addison123456: why is Shakespeare so famous?
1 day ago 49 Replies 3 Medals
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!