
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
Given the sample data $a_{1}$, $a_{2}$, … $a_{2018}$ has a variance of $4$, if $b_{i}=a_{i}-2$ $(i=1,2,…,2018)$, then the variance of the data $b_{1}$, $b_{2}$, … $b_{2018}$ is \_\_\_\_\_\_.

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