Final answer:
Mr. Howard lost 12 pounds over the course of 6 weeks.
Step-by-step explanation:
The correct statement is B. The middle 50 percent of the members lost from two to 8.5 lbs.
To calculate the weight lost over the course of 6 weeks, we can multiply the rate at which Mr. Howard lost weight (2 pounds per week) by the number of weeks (6 weeks):
Weight lost = 2 pounds/week * 6 weeks = 12 pounds