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Evaluate the formula $n=\left(\frac{z \cdot \sigma}{E}\right)^{2}$ when $z=1.862, E=11$, and $\sigma=221$
$n=\square$ (Round up to the nearest whole number as needed.)

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Answer

Final Answer: $n=\boxed{1400}$

Steps

Step 1 ：Given values are $z = 1.862$, $E = 11$, and $\sigma = 221$.

Step 2 ：Substitute the given values into the formula $n=\left(\frac{z \cdot \sigma}{E}\right)^{2}$.

Step 3 ：After substituting the values, the formula becomes $n=\left(\frac{1.862 \cdot 221}{11}\right)^{2}$.

Step 4 ：Solve the equation to find the value of $n$.

Step 5 ：Round up the value of $n$ to the nearest whole number.

Step 6 ：Final Answer: $n=\boxed{1400}$