
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 a student mistakenly entered one of the data points, 105, as 15 when calculating the average of 30 pieces of data, find the difference between the calculated average and the actual average.

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