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Tom Marley and Jennifer Griggs have recently started a marketing research firm in Jacksonville, Florida. They...

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Basic Math

Tom Marley and Jennifer Griggs have recently started a marketingresearch firm in Jacksonville, Florida. They have contacted theFlorida Democratic Party with a proposal to do all politicalpolling for the party. Since they have just started their company,the state party chairman is reluctant to sign a contract withoutsome test of their accuracy. He has asked them to do a trial pollin a central Florida county known to have 60% registered DemocraticParty voters. The poll itself had many questions. However, for thetest of accuracy, only the proportion of registered Democrats wasconsidered. Tom and Jennifer report back that from a random sampleof 1000 respondents, 520 were registered Democrats.

  1. Determine the probability that such a random sample would resultin 520 or fewer Democrats in the sample.

  2. Based on your calculations in part a, would you recommend thatthe Florida Democratic Party (or anyone else for that matter)contract with the Marley/Griggs marketing research firm? Explainyour answer.

Answer & Explanation Solved by verified expert
3.6 Ratings (645 Votes)
p 060n 1000    See Answer
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