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Mathematics, 19.02.2020 04:45 lsizzle59
A 20-minute consumer survey mailed to 500 adults aged 25-34 included a $5 Starbucks gift certificate. The same surveywas mailed to 500 adults aged 25-34 without the gift certificate. There were 65 responses from the first group and 45 fromthe second group. Form a 95 percent confidence interval for the difference of proportions. Does it include zero?
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A 20-minute consumer survey mailed to 500 adults aged 25-34 included a $5 Starbucks gift certificate....
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