Final answer:
Without Michael's specific frequency table on his computer usage, we cannot accurately determine the total hours he spent on the computer.
Step-by-step explanation:
Michael wishes to calculate the total number of hours he spent on the family computer over a 10-week period using a frequency table. To find the total amount of time, one would need to multiply each time value by the number of occasions it occurred (frequency), and then sum up all the resulting values. However, the provided data does not relate directly to Michael's computer usage as it pertains to a different study about the number of hours students worked per day, usage of a personal computer for entertainment, and hours spent by teenagers doing chores and playing video games. Therefore, without Michael's specific frequency table data, we cannot accurately answer how many hours he spent on the computer.