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Key Concepts Quiz 2.2
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Use the documents below to help answer the questions:



1
Identify the population: automobile engines burn increasing amounts of oil as they accumulate operating time.
A)All automobile engines that use oil.
B)All automobiles.
C)All of the oil in all of the automobile engines.
D)All automobile engines.
2
A census would be suitable for
A)determining how Canadians will vote in the next federal election.
B)estimating what percent of airline passengers develop air sickness.
C)diagnosing how many wild moose suffer from brainworm.
D)choosing where the members of a school class will hold the class picnic.
3
A sample would be suitable for
A)making a roster of part-time staff in a store who would like to move up to full-time.
B)estimating the percent of bicycles in a bicycle shop that were manufactured offshore.
C)determining what percent of fish in a large lake were carp.
D)finding the percent of red candies in a box of assorted colours.
4
A company that employs machinists, carpenters, packagers, and office staff would like to form a committee to write recommendations for a safety manual. The best sampling strategy for this case is
A)non-random.
B)stratified random.
C)systematic random.
D)simple random.
5
Biryan has been put in charge of selecting the lineup of music to be played at the next school dance. He decided to ask other students for advice. Which sampling method is most likely to be free of bias?
A)Biryan can ask several of the people that he normally socializes with.
B)Biryan can ask members of his own grade 9 class.
C)Biryan can walk down the hallways during a class change, and ask every 10th student to name a piece they would like to hear at the dance.
D)Biryan can ask only grade 12 students for advice, since they have more experience at going to dances.
6
Bias can occur in a survey if
A)the sample is selected only because it is convenient.
B)respondents may choose whether or not to participate.
C)the questions are worded to encourage a particular answer.
D)All of these can lead to bias.





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