Math Help - Normal

1. Normal

Find $\mathbb{P}\{X^{4}\le 1\}$ for $X$ ~ $N(0, 0.25)$.

I am really struggling with this, can anyone help?

2. Originally Posted by slevvio
Find $\mathbb{P}\{X^{4}\le 1\}$ for $X$ ~ $N(0, 0.25)$.

I am really struggling with this, can anyone help?
$\Pr(X^4 \leq 1) = \Pr(-1 \leq X \leq 1)$.

3. Thank you this makes sense