Question: Suppose you want to decrease your margin of error by a factor of 4. By what factor, do you need to increase your sample size?

Suppose you want to decrease your margin of error by a factor of 4. By what factor, do you need to increase your sample size?

In other words, if you want to decrease your margin of error from 28%to 7%by what factor do you need to increase your sample size?

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