For each student, calculate backpack weight as a percentage of body weight (round to one decimal place).
Based on the data in part (a), estimate the mean percentage of body weight that eleventh-grade boys carry in their backpacks.
Find the margin of error for your estimate of part (b). Round your answer to three decimal places. Explain how you determined your answer.
Comment on the amount of weight eleventh-grade boys at this school are carrying in their backpacks compared to the recommendation by the Health Group.