
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Let the random variable $X$ follow a normal distribution with density

$$
p(x)=\frac{1}{\sigma \sqrt{2 \pi}} \cdot e^{-\frac{(x-a)^{2}}{2 \sigma^{2}}}
$$

Find the probable deviation of this random variable, i.e., find a constant $E$ such that

$$
P(|X-a|<E)=50 \%
$$

Present the answer in LaTex format: \boxed{Your answer}
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