80th percentile for this data equal twice the 40th percentile? Explain. 12. Weight data. A large group of people are part of a study. Thirty people have weights in the range 110-130 pounds, seventy are in the range 130- 150 pounds, twenty are in the range 150-170, and thirty are in the range 170-190. The weights are spread fairly evenly in these ranges. (a) True or false and explain: the SD for this data is larger than 39 pounds. (b) Give the 80th percentile for this data and explain. business