Definition: "Data 390X" refers to a collection of data that was collected in an experiment involving 390 participants. The term "data" usually refers to information, but it could also refer to specific numbers or statistical values obtained from that experiment. "390X" stands for "Three Thousand and ninety", which is the number used in counting experiments like this one. The phrase "Data 390X" signifies that the data was gathered in an experiment measuring 3,900 participants, providing insights into the demographics and performance of those surveyed.