Example of noise removal techniques from student and teacher answers
| Question | Answer | Case folding (lower case) | Stop word, punctuation, and spelling errors |
|---|---|---|---|
| What is a variable? | Teacher answer: A location in memory that can store a value | a location in memory that can store a value | location memory store value |
| Student answer: A variable is the location in computer’s memory where a value can be stored for use by a program | a variable is the location in computer’s memory where a value can be stored for use by a program | variable location computer memory value stored program |
| Question | Answer | Case folding (lower case) | Stop word, punctuation, and spelling errors |
|---|---|---|---|
| What is a variable? | Teacher answer: A location in memory that can store a value | a location in memory that can store a value | location memory store value |
| Student answer: A variable is the location in computer’s memory where a value can be stored for use by a program | a variable is the location in computer’s memory where a value can be stored for use by a program | variable location computer memory value stored program |
Source(s): Authors’ own creation