A normal distribution is being tested with the hypothesis $H_o: \mu = 0$ and $H_1: \mu>0$. The standard deviation is $3.5$. Calculate the power if the true mean is $11.3\ $?
Attempt
Power = 1 − P(not rejecting a false Ho)
\begin{equation} Power = 1 − P(not rejecting a false Ho) \end{equation}
How do I calculate the probability of not rejecting a false $H_o\ $?