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1. If the margin of error for the survey was 3.5 percentage points with confidence. What this means is: There is 85​% confidence that the proportion of the adult citizens of the nation that dreaded​ Valentine’s Day is between 0.205 and 0.275.

   Confidence interval

   Using this formula

   Confidence interval= Population proportion ± Margin of error

   Where:

   Population proportion=24%

   Margin of error=3.5%

   Let plug in the formula

   Confidence interval=(24%-3.5%), (24%+3.5%)

   Confidence interval=0.205,  0.275

   Therefore If the margin of error for the survey was 3.5 percentage points with confidence. What this means is: There is 85​% confidence that the proportion of the adult citizens of the nation that dreaded​ Valentine’s Day is between 0.205 and 0.275.

   Learn more about Confidence interval here: https://brainly.com/question/16399589

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