1. The center of a normal curve is cannot be negätive 6 is the mean of the distribution always equal to zero d. is the standard deviation a. c. 2. In a standard normal distribution, the mean is I and the standard deviation is 0 a. mean and the standard deviation are both 1 mean and the standard deviation can have any value d.) mean is 0 and the standard deviation is 1 b. C. 3. Z is a standard normal random variable. What is the value of Z if the area to the right of Z is 0.0122? 1.25 a. b. -1.25 -2.25 0.0128944 d. 2.25 to