Which of the following are NOT a characteristic of a z or standard normal distribution? Used when data size is >30 Mean is always zero Ranges from 3 to 3 Standard Deviation is always 10 Question 13 The human resources director of a large corporation wants to develop a dental benefits package and decides to select 100 employees from a list of all 5,000 workers in order to study their preferences for the various components of a potential package. All the employees in the corporation constitute the population otatistic parameter