Q1. If we have estimated the daily mean distance commuted by a selected group of workers of a manufacturing facility, then we have information about an ------------------------------ of an unique characteristic of the employees of the company. (statistic, parameter, data] Q2. A subject is a single member of a ------------------------- . (sample, population, sampling unit) Q3. An element is a single member of a ----------------------- . (sample, population, sampling unit) Q4. ----------------------- sampling designs are used when the researcher gives importance to wider generalizability justifying proper representativeness of the sample. (probability, nonprobability)