Answer:
Explanation:
I believe this is right.
Define T= X + Y
a. Find and Interpret Mu T.
Mu T= Mu x+y
Mu x+y= Mu x + Mu y
Mu x+y= 4.75+ 4.9
Mu T= 9.65
b. Calculate and Interpret Sigma T.
Sigma T= Sigma x+y
Sigma x+y= √σ^2 (of x)+ σ^2 (of y)
Sigma x+y= √(0.698)^2+(0.768)^2
Sigma T= 1.0378