The collection of all elements/units about which an experimenter wishes to make inference is?

In a file-oriented information system, a work file stores relatively permanent data about an entity is created and saved for backup and recovery purposes stores records that contain day-to-day business and operational data is a temporary file created by an information system for a single task

Awell-diversified portfolio needs about 20-25 stocks from different categories is this true or false?

To increase sales, robert sends out a newsletter to his customers each month, letting them know about new products and ways in which to use them. in order to protect his customers' privacy, he uses this field when addressing his e-mail. attach bcc forward to