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anonymous
 one year ago
Two studies were completed in California. One study in northern California involved 1,000 patients; 74% of them experienced flulike symptoms during the month of December. The other study, in southern California, involved 500 patients; 34% of them experienced flulike symptoms during the same month. Which study has the smallest margin of error for a 98% confidence interval?
anonymous
 one year ago
Two studies were completed in California. One study in northern California involved 1,000 patients; 74% of them experienced flulike symptoms during the month of December. The other study, in southern California, involved 500 patients; 34% of them experienced flulike symptoms during the same month. Which study has the smallest margin of error for a 98% confidence interval?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The northern California study with a margin of error of 3.2%. The southern California study with a margin of error of 3.2%. The northern California study with a margin of error of 4.9%. The southern California study with a margin of error of 4.9%.

kropot72
 one year ago
Best ResponseYou've already chosen the best response.1The margin of error is found from \[\large 2.33\sqrt{\frac{p(1p)}{n}}\] where p is the sample proportion expressed as a decimal. Therefore the margin of error for the northern California study is \[\large 2.33\sqrt{\frac{0.74\times0.26}{1000}}=you\ can\ calculate.\] Now you need to use the same procedure to find the margin of error for the southern California study.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so whats the answer?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0because both A and D are the answer but only one can be chosen!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok, A is the correct choice!
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