What formula do I need to find the confidence interval, when I have got:
- Number of samples
- Level of Confidence
- The assumed (1st guess) accuracy
I found the following equation online: µ = z * [p * (1 - p) / n] ^ (-1/2)
The Attempt at a Solution
When I fill in this formula, I get µ = 125.5, while I think the confidence interval should be around 3 percent.