Given independent random variables with means and standard deviations as shown, find the mean and standard deviation of each of these variables: a) 4X
B) 5Y+2
C) 4X+2Y
D) 3X-4Y
E) X1+X2

Mean SD
X 100 14
Y 15 2

a) Find the mean and standard deviation for the random variable 4X
E(4X) =
SD(4X)=

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.

What the f u c k tou are talking