I have two questions and I will start with the tough one,
Assume I have a random variable y with mean and std Uy and Sy
Now the std of y Sy is equal to:
Sy = F(L) a function of another random variable L
Now the L variable is given as samples (sample readings)
how can I find Sy in terms of SL (given that SL is std for L)
The second question is do you happen to know a good and easy probability and statistics book the cover this issue with applications in engineering?