Experience as a source of knowledge holds that things are to be done as they have always been done. Select one: True False A descriptive explanation of individual concepts and how they can be measured is..... O a. Operations Research O b. Conceptual definition O c. Concepts defined O d. Operational definition Which of the following techniques yields a simple random sample? O a. Randomly selecting schools, and then sampling everyone within the school. O b. Numbering all the elements of a sampling frame and then using a random number table to pick cases from the table. O c. Choosing volunteers from an introductory psychology class to participate O d. Listing the individuals by ethnic group and choosing a proportion from within each ethnic group at random. Random sampling is an example of non- probability sampling procedures. Select one: True False