Suppose, to Select a Sample from a Population of 3000

question 26

Multiple Choice

Suppose, to select a sample from a population of 3000 persons, the following procedure is followed. The names of the people are written on identical, square pieces of thin cardboard measuring one inch on a side, and these pieces of cardboard are then tumbled in a clothes dryer (with the heat shut off) . After 30 minutes, a blindfolded person reaches in and withdraws a selected number of names. What can be said about this sample?

• A) The sample is probably biased because clothes dryers are not supposed to be used in collecting samples.
• B) The sample is probably biased because people with shorter names would be selected first.
• C) The sample is probably biased because the names on the top of the heap would be selected first.
• D) The sample is probably biased because the names toward the front of the dryer would probably be selected first.
• E) The sample is almost certainly random.

---

Definitions:

Exothermic

An exothermic reaction is a chemical reaction that releases heat and energy to its surroundings.

Activation Energy

Activation energy is the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.

Flashover

An event in which an entire room or area bursts into flames almost simultaneously, often due to the rapid spread of fire through combustible materials.

Bomb Calorimeter

An apparatus used to measure the heat of combustion of a sample, essential in the determination of calorific values.