Which of the following is NOT an observation about critical values? Choose the correct answer below. A. The number Z/2 is a critical value that corresponds to an area of 1 - /2 to its left. B. A critical value is the number on the borderline separating sample statistics that are likely to occur from those that are unlikely to occur. C. A critical value is the area in the right-tail region of the standard normal curve. D. The number Z/2 is a critical value that is a z score with the property that it separates an area of x /2 in the right tail of the standard normal distribution. A data set includes 104 body temperatures of healthy adult humans having a mean of 98.7F and a standard deviation of 0.66F. Construct a 99% confidence interval estimate of the mean body temperature of all healthy humans. What does the sample suggest about the use of 98.6F as the mean body temperature? Click here to view a t distribution table.1 2 Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. What is the confidence interval estimate of the population mean ? F