8.1 Comparing Two Population Proportions: Independent Sampling
Teaching Tip
Discuss the basic differences between a population mean and a population proportion. Help the student identify the key words that will suggest either means or proportions.
Suppose a presidential candidate wants to compare the preferences of registered voters in the northeastern United States with those in the southeastern United States. Such a comparison would help determine where to concentrate campaign efforts. The candidate hires a professional pollster to randomly choose 1,000 registered voters in the northeast and 1,000 in the southeast and interview each to learn her or his voting preference. The objective is to use this sample information to make an inference ...
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