A host on a cruise ship wants to collect data on the time passengers spend at various activities on board. Which of the following best describes a random sample of passengers? The host selects the first passengers who board because these passengers are easily accessible.
The host assigns each passenger a different number. Using a random number table, he draws of those numbers at random. Then, he selects the passengers assigned to the drawn numbers. Every set of passengers is equally likely to be drawn using the random number table.
The host forms groups of passengers based on the levels of the ship that the passengers' cabins are on. Then, he selects passengers at random from each group.