Is weapon detection at LAX (72 out of 100) consistent with the national rate of 0.80?
In this simulation, the null hypothesis is that the detection rate at LAX is the same as the national rate:
Click Accumulate and simulate attempts to carry 100 weapons on board planes between 100 and 200 times. (Hold down the Simulate button.)
Detecting only 72 weapons would be unlikely if LAX had the same security as elsewhere so there is strong evidence that its detection rate is lower than 0.80.
Emphasise the general concepts:
In 1987, the Federal Aviation Administration (FAA) investigated security at Los Angeles International Airport (LAX). In one test, it was found that only 72 out of 100 mock weapons that FAA inspectors tried to carry onto planes were detected by security guards (Gainesville Sun, Dec 11, 1987).