Question

A grocer receives cartons of 12 eggs in boxes of 100 cartons. In a particular month, the grocer receives 4 shipments of eggs with 20 boxes in each shipment. The grocer wants to estimate the proportion of cartons he receives this month that include at least one broken egg. Which of the following sampling methods would be most appropriate?

Obtain a stratified sample by examining 100 randomly selected cartons from each of the 4 shipments.

Obtain a cluster sample by randomly selecting 3 boxes and examining every carton in those 3 boxes.

Obtain a convenience sample by examining every carton on the grocery store's shelves one day.

Obtain a systematic sample by examining the top carton in the top right corner of each box.

Answer 1

Correct option:

Obtain a systematic sample by examining the top carton in the top right corner of each box.

EXPLANATION:

Egg being a fragile item that is susceptible to break and become useless while handing, it is not advisable in this present context involving eggs to examine items in a carton. It is easier and safer to pick an egg at the top carton in the top right corner of each box and examine it.

Answer 2

Obtain a stratified sample examining 100 randomly selected cartons from each of the 4 shipments.