Let X, and X2 be independent, each with unknown mean u and known variance o2 = 1. Let u = (X1 + X2)/ 2. Find the variance of u`.
A.0.5
B.0
C.1
D.2

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

The sum of two numbers is 86, and their difference is 20. find the two numbers

If i have a 24 in loaf of bread and i cut it into two pieces one 9 in how long was the other