3. [113 Points] PREVIOUS ANSWERS BBBASICSTATS 3.2.022. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in the southwestern United States gave the following information about a prehistoric extended family group of 88 members on what is now a Native American reservation. For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answers to one decimal place.) Age range (years) 1710 11720 21730 31 and over Number of individuals 40 21 20 7 E = 14 a ,p 52 : 7 2 x s : Need Help? @