For a survey of senior citizens, a copy of the annual city census is obtained, and 30,000 residents 65 years of age and older are identified. A total of 400 seniors is selected, of whom 250 are interviewed. There are __________ senior citizens in the sampling frame.
Answer: The sampling frame is 400 and the sample 250.
Step-by-step explanation:
The sampling frame is a list of elements used to determine the samples. The sampling frame contains 400 senior citizens of which 250 samples were interviewed.
