(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

In an example my book says that the expression bellow is unbiased.

I can't see why this is exactly...

2. Relevant equations

[tex]

\begin{array}{l}

\hat p = \frac{X}{n} \\\\

E(\hat p) = E\left( {\frac{X}{n}} \right) = \frac{1}{n} \cdot E(X) = \frac{1}{n} \cdot (n \cdot p) = p \\

\end{array}

[/tex]

3. The attempt at a solution

Could the reason be that the expression comes down to just p, which is simply a probability and we have no better suggestion than to believe that it "hits the target"? (If that didn't make any sense, just ignore it)

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# Homework Help: Unbiased expression?

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