There was a great deal of publicity a few years ago about allegationes that gravel companies delivered less gravel tian contacts demanded. After a lengthy investigation, the cily managers concluded that
the allegations were unfounded. However, they also claimed that it was too expensive to measure
every load and were forced to rely upon the bonesty of the catrictor! Having successfully
completed an introductory statisties course and having been just hired by the city, you point out that it
is not necessary to weigh every truck; why not just weigh a sample? Your survisor is not convinced
and asks for a demonstration
A current contract for a 1 kilometer stretch of road requires gravel till for a width of 10 meters and
a depth of 1 meter The successful bidder estimated it will take 500 tandem-track loads of gravel. The
total amount of gravel required is 10,000 m' So the moun volume of gravel in the 500 trucks must be
at least 20 m.