8. For each of the following situations describe the population of interest and

Question

8. For each of the following situations describe the population of interest and the sample. A hospital administration would like to know the average length that a patient stays in the hospital. It would be almost impossible to look through all of the past records and average the lengths of stay. Instead, a sample of 1000 patients over the last year was randomly chosen and their lengths of stay were averaged. The freshness and overall quality of milk depend upon the type of packaging used. The manager of a dairy company is considering changing the packaging from cartons to plastic. The quality control team of this dairy company packaged milk in 100 containers of each type of material. After a specific amount of time, the team tested the milk for freshness and overall quality a. b.

Explanation / Answer

(a) Population: Of all the patients in the hospital, length that each patient stays in the hospital

Sample: Of the 1000 patients in the hospital, length of each patient stays in the hospital

(b) Population: All containers of all types of material for packaging milk in the company

Sample: 100 containers of each type of material for packaging milk in the company

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