When performing a test of Ho: Bj = 0, which of the following are true about the rejection region diagram? (Check all that apply.) It is bell-shaped. Everything to the right of the critical value is shaded. Everything to the left of the negative of the critical value is shaded. It is centered on zero. U Everything to the right of the negative of the critical value is shaded. It is entirely in the first quadrant. It is skewed right. Everything to the left of the critical value is shaded