Grade 12 Data Management
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Unit 1 - Culminating Project: Beginning of your Journey
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Senior 3 - 4
Senior 3 - 3
Unit 1 - Quiz: sampling and bias
Identify the sampling method in each case, using descriptors such as simple random, systematic, stratified, multistage, voluntary-response, cluster and convenience.
The government randomly selects 20 towns and then surveys everyone in each town
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In 2004, the Lancet medical journal published a controversial study of the number of deaths in a war. In the study, data were collected by first randomly selecting 33 populated locations. Surveyors went to each location and drove around that city or town mapping it with a GPS unit. Then, they randomly selected one neighbourhood in the area and surveyed the 30 nearest households. Describe the type of sampling method and discuss its validity
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Classify the bias in each situation using words such as sampling, measurement, response and non-response bias.
Your teacher asks you to raise your hand if you did your homework last night
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A patient taking medication sometimes gets better simply because he or she thinks that the medication is working. This is called the placebo effect. To compensate for this effect, trials of new medicines often include three participant groups. One group is given the actual medication, the second group is given a placebo (medication that has no active ingredient), while the third group is given nothing. Describe the purpose of each group
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