Which of following properties is not true about the uniform distribution? Select one: O a. Is symmetric. O b. It has no mode. O c. The mean (expected value) and the median are equal. O d. None of the given options is correct. Distance between true value of population parameter and estimated value of population parameter is called. Select one: O a. error of central limit O b. error of confidence interval O c. error of estimation O d. error of hypothesis testing The standard normal distribution, with a random variable z, has the following properties_ Select one: Q a. A mean = +1. O b. A mean = -1 O c. A standard deviation = 0 O d. A mean = 0 and A standard deviation = 1