Final answer:
The average amount of stored data per user for the first eight years would be calculated by dividing the total recorded data by the number of users, which requires additional information not provided.
Step-by-step explanation:
To calculate the average amount of stored data per user, we need to find the total amount of data collected and divide it by the number of users over the first eight years. From the information given, the Sloan Survey recorded data at 8 megabytes per second, adding up to over 15 terabytes throughout the project span.
Yet, to determine the average per user, we would need the total number of users during the eight-year period, which isn’t provided. Without this information, we cannot calculate the average precisely. However, if we had the number of users, we would use the formula:
Average Data per User = Total Data Recorded / Number of Users.