Final answer:
The statement is false; all data, including string data (letters), must be converted into binary to be stored in RAM. Computers use binary logic to process and store any kind of data.
Step-by-step explanation:
The statement that string data (letters) does not need to be converted to binary to be stored in RAM is false. All data stored in a computer's RAM must be in binary form because the fundamental building blocks of digital electronics, specifically transistors within memory chips, operate using binary logic. Therefore, whether the data is a number, a letter, or any other symbol, it must be encoded into binary format to be processed and stored by a computer. This binary representation for letters and characters is often based on standardized encoding schemes like ASCII or Unicode.