Which of the following is NOT an observation about critical values? Choose the correct answer below. A. A critical value is the number on the borderline separating sample statistics that are likely to occur from those that are unlikely to occur. B. The number z Subscript alpha divided by 2zα/2 is a critical value that is a z score with the property that it separates an area of alpha divided by 2α/2 in the right tail of the standard normal distribution. C. The number z Subscript alpha divided by 2zα/2 is a critical value that corresponds to an area of 1minus−alpha divided by 2α/2 to its left. D. A critical value is the area in the right-tail region of the standard normal curve.