Sketch a normal sampling distribution and shade the area for the P-value. Choose the correct graph. A. 0 -z z one half Upper P one half Upper P A normal curve is over the horizontal axis and is centered on 0. Vertical line segments extend from the curve to the horizontal axis at negative z and z, where z is to the right of 0. The area under the curve to the left of negative z is shaded and labeled one half Upper P. The area under the curve to the right of z is shaded and labeled one half Upper P. B. 0 z Upper P A normal curve is over the horizontal axis and is centered on 0. A vertical line segment extends from the curve to the horizontal axis at z, where z is to the right of 0. The area under the curve to the right of z is shaded and labeled P. C. 0 z Upper P A normal curve is over the horizontal axis and is centered on 0. A vertical line segment extends from the curve to the horizontal axis at z, where z is to the left of 0. The area under the curve to the left of z is shaded and labeled P. D. 0 -z z Upper P