Let α1 > 0, α2 > 0, with α1 + α2 = α. then p −zα1 < x − μ σ/ n < zα2 = 1 − α. (a) use this equation to derive a more general expression for a 100(1 − α)% ci for μ of which the interval below is a special case. x − zα/2 · σ n , x + zα/2 · σ n x − zα2 · σ n , x + zα1 · σ n x − zα2 · σ n , x + zα1 · σ n x − zα2 · σ n−1 , x + zα1 · σ n−1 x − zα2 · σ n2 , x + zα1 · σ n2 x − zα2 · σ n−1 , x + zα1 · σ n−1 (b) let α = 0.05 and α1 = α/4, α2 = 3α/4. does this result in a narrower or wider interval than the interval in part (a)? the interval is narrower. the interval is wider. the interval does not change.