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Name: April 19, 2001 Score:

MATH 147

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Quiz 11

(10pts.)

Problem 1. A certain town consists of 1000 people with the following political affiliations: 400 are Democrats, 350 are Republican, 100 are Independent, 50 are Libertarian and 100 are Green. A random sample of 100 people is taken without replacement.

Find the expected value for the percent of Democrats in this sample.

Find the standard error for the percent of Democrats in this sample.

Approximately what is the probability that your sample contains between 38% and 42% Democrats?