Please show all steps and don't copy other answers. 4. Suppose {Y1,Y2,Yn} are independent r.v.'s with YiN(+xi,2) where xi 's are known constants. Show that the M.L.E's of ,, and 2 are given by 2=yx=i=1n(xix)2i=1n(xix)(yiy)=ni=1n(yixi)2 where x=n1i=1nxi and y=n1i=1nyi..

1. Please show all steps and don't copy other answers. 4. Suppose {Y1,Y2,Yn} are independent
r.v.'s with YiN(+xi,2) where xi 's are known constants. Show that the M.L.E's of ,, and 2 are
given by 2=yx=i=1n(xix)2i=1n(xix)(yiy)=ni=1n(yixi)2 where x=n1i=1nxi and y=n1i=1nyi.