Mathematics, 05.05.2020 22:36 mdaniella522
A relief fund is set up to collect donations for the families affected by recent storms. A random sample of 400 people shows that 28% of those 200 who were contacted by telephone actually made contributions compared to only 18% of the 200 who received first class mail requests. Which formula calculates the 95% confidence interval for the difference in the proportions of people who make donations if contacted by telephone or first class mail?
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A relief fund is set up to collect donations for the families affected by recent storms. A random sa...
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