
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:  
15  11  13  15  17  19  15  18  20  19  
16  14  15  17  16  12  14  15  16  18  
If we create a frequency distribution table with an interval of 2, the frequency for the group ranging from 16.5 to 18.5 is ____.

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