c. Identify which of these types of sampling methods is used: random, simple ran

Question

c. Identify which of these types of sampling methods is used: random, simple random, systematic, convenience, stratified, or cluster. A researcher wants to investigate whether BMI (Body Mass Index) depends on gender. From each group of females and males he then randomly selects 50 individuals. · A quality control engineer selects every 100th thermometer that is produced by the company. Biostatistics- Homework 1 Page 2 of 5 group of 100 people are randomly identified by numbers between 101 and 200. Then a sample is chosen by selecting all individuals whose identification number ends in the digit "2". A A researcher randomly selects ten blocks in the Village of Newport, and then asks all adult residents of the selected blocks whether they have ever had a blood transfusion . nurse plans to obtain a sample of patients by selecting the first 36 patients that she encounters when she begins her work. A

Explanation / Answer

(c)
1. stratified, because the population has been divided into 2 groups.
2. systematic, because every 100th population unit is chosen.
3. systematic, because every 10th population unit is chosen after identification number 102.
4. cluster, because 10 clusters have been chosen out of many clusters.
5. convenience, because sample has been chosen based on convenience purely.

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