Final answer:
John lost a total of 7 pounds over four weeks. Options A, B, and C provided in the question do not pertain to John's situation specifically, as they refer to a group of individuals, not just one person. Hence, we cannot determine the correct statement based on the information about John's weight change alone.
Step-by-step explanation:
To calculate the change in weight over the four weeks for John, we need to add up the weight changes for each week: he lost 6 pounds the first week, then lost 1 pound, gained 2 pounds, and lost 2 pounds in the subsequent weeks.
The sum of these changes is (-6) + (-1) + (+2) + (-2). The negative numbers represent weight loss, and the positive numbers represent weight gain. Performing the calculation, we get: -6 -1 +2 -2 = -7. So overall, John lost 7 pounds over the four-week period.
Considering the options provided:
- Option A suggests that one fourth of the members lost exactly two pounds, which we cannot confirm based on the information regarding John alone.
- Option B mentions the middle 50 percent of members lost from two to 8.5 lbs, but this does not relate to John's specific case.
- Option C indicates that most people lost 3.5 to 4.5 lbs, which is also not relevant to John's situation.
- Option D states that all choices are correct, which does not apply since we cannot verify A, B, or C based on John's weight change.
Therefore, with the information provided, we do not have enough data to determine the correct statement from the choices given, as they pertain to a group rather than an individual's weight change.