(A) μ+0.6745σ and μ-0.6745σ
(B) -0.6745 and 0.6745
(C) -0.7979 and 0.7979
(D) -0.7979σ and 0.7979σ
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(A) μ+0.6745σ and μ-0.6745σ
(B) -0.6745 and 0.6745
(C) -0.7979 and 0.7979
(D) -0.7979σ and 0.7979σ