$H_0: p = 0.1$
$H_a: p \neq 0.1$
So here I have a pretty small sample, and I read somewhere that in order to approximate this binomial distribution with the normal distribution, I have to have $n*p > 5$ and $n*(1-p) > 5$. Since $30 * 0.1 = 3 < 5$, does that mean I cannot use the $Z$ statistic here? If so, what can I do to overcome this?