
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
To assess the quality of a batch of cotton, quality inspectors randomly sample 6 strands and find that the average fiber length is 25mm. The lengths of the first five sampled strands are: 20mm, 26mm, 22mm, 20mm, and 22mm. The standard deviation of the fiber lengths of these 6 strands is ______.

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