Ask your own question, for FREE!
Mathematics 34 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
Unknownuser8009: I have 12 days till my birthday... thoughts on what should I do?
5 minutes ago 0 Replies 0 Medals
xXAikoXx: i have hip pain help.
1 hour ago 2 Replies 1 Medal
alphaXtiger: help .,.
2 hours ago 5 Replies 1 Medal
ihy: here's a song
5 hours ago 0 Replies 0 Medals
ihy: Here's a song I learned.
5 hours ago 0 Replies 0 Medals
abound: Im sad
4 hours ago 6 Replies 1 Medal
xXAikoXx: i got upper back pain help
5 hours ago 9 Replies 2 Medals
Gdub08: What's the best way to study for a test and quiz?
7 hours ago 9 Replies 1 Medal
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!