All Airline Passengers Must Pass Through Security Screenings, but Some

question 243

Essay

All airline passengers must pass through security screenings, but some are subjected to
additional searches as well. Some travelers who carry laptops wonder if that makes them
more likely to be searched. Data for 420 passengers aboard a cross-country flight are
summarized in the table shown. Does it appear that being subjected to an additional search
is independent of carrying a laptop computer? Explain.

---

Definitions:

External Circuit

The portion of an electrical circuit that is outside the internal system, connecting it to external devices or other circuits.

Shunt Field

A winding in electrical generators or motors that is connected parallel to the armature, influencing the magnetic field.

Armature

The rotating part of an electric machine, such as a motor or generator, within which voltage is induced by magnetic action.

Magnetic Field

A region around a magnetic material or a moving electric charge within which the force of magnetism acts.