Quiz 5 Sp10

# Quiz 5 Sp10 - Quiz 5 Statistics 21 Spring 2010 Ibser 1 The...

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Unformatted text preview: Quiz 5 Statistics 21 Spring 2010 Ibser 1) The 2010 gubernatorial election will be held later this year to choose a new governor of California. Suppose you somehow take a simple random sample of registered voters of size 10,000 and you wish to know the percentage of all registered voters that would vote Democrat at the time the sample is taken. Assume all voters chosen to be in the sample give an answer as to whether or not they would vote Democrat (i.e. no undecided voters) and that their answer is truly how they would vote in an anonymous election. In other words, there is no bias introduced in the sample. Suppose the sample percentage of registered voters who would vote Democrat is 59.5%. (a) Find an approximate 88% confidence interval for the percentage of registered voters who would vote Democrat (b) True or False and explain why: There is an 88% chance that the percentage of all registered voters that would vote Democrat at the time the sample is taken is in the interval you found in part a).voters that would vote Democrat at the time the sample is taken is in the interval you found in part a)....
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## This note was uploaded on 02/08/2011 for the course STAT 21 taught by Professor Anderes during the Fall '08 term at Berkeley.

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