Researchers who are trying a new shampoo formula plan to compare the condition of hair for people who use the new formula with the condition of hair for people who use the existing formula. Twelve volunteers have tried the shamp0o and so will serve as our population. Information on those volunteers (numbered 1 to 12) is presented in the table before. 5. Number 1 3 4 5 7 8 10 11 12 Gender Male Female Male Female Female Male Male Female Male Female Male Female Age 21 20 47 60 62 61 58 44 44 24 23 46 a) Researchers want to conduct an experiment to compare the two formulas. They believe response is affected by age but not gender. Design and carry out a stratified sample of this population. There should be 6 people in the sample.