IR The Differentiate between a. parameter and statistic The term refers to quantities such as the mean and standard deviation of a population or distribution of data. The term refers to an estimate that is made from a sample of data. b. population mean and sample mean. mean is the true mean of the data. The mean is the arithmetic average of a limited set of data point c. random and systematic error. errors are those that can be ascribed to a particular cause and can usually be determined errors result from uncontrolled variables in an experiment. d. accuracy and precision describes the agreement among measurements that have been performed in eactly the same way, represents the agreement between an experimentally measured value and the true or accepted value