Question

求一道有关正态分布的题，急求

You decide that 200 people will be targeted for the test. You want to be 90% certain that the results will be accurate on the roll out. In order for the test to be profitable, the minimum response rate is 3.2%. Based on this information, calculate the range in response that would tell you to roll out the campaign to your entire list.
是不是要用n=(p*(1-p)* z²)/ precision² 这个公式？

Answer 1

你决定，200人将有针对性的测试。你想90%确定结果将准确的推出。在测试顺序是有利可图的，最低限度的回应率是3.2%。根据这一信息，计算的各种反应，会告诉你推出的运动，您的整个名单。