Which of the following best represents our question? A. Is εi,j = 0? B. How close are the Yi,j to d? C. Is b1 ̸= b2? D. Are b1 = 0 and b2 = 0 ? Suppose we define Y¯ 1 as the average of poll results...

Which of the following best represents our question?

A. Is εi,j = 0?

B. How close are the Yi,j to d?

C. Is b1 ̸= b2?

D. Are b1 = 0 and b2 = 0 ?

Suppose we define Y¯
₁
as the average of poll results from the first poll, Y₁,₁, . . . , Y₁,N₁
with N1 the number of polls conducted by the first pollster:

What is the expected values Y¯
₁?