Mathematics, 22.04.2021 06:00 jayy1733
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 77 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) 1-10 11-20 21-30 31 and over
Number of individuals 30 16 20 11
x =
s2 =
s =
Answers: 3
Mathematics, 21.06.2019 19:10, Lewis5442
Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?
Answers: 1
Mathematics, 21.06.2019 21:30, mandyangle01
Using pert, adam munson was able to determine that the expected project completion time for the construction of a pleasure yacht is 21 months, and the project variance is 4. a) what is the probability that the project will be completed in 17 months? b) what is the probability that the project will be completed in 20 months? c) what is the probability that the project will be completed in 23 months? d) what is the probability that the project will be completed in 25 months? e) what is the due date that yields a 95% chance of completion?
Answers: 3
What was the age distribution of prehistoric Native Americans? Extensive anthropological studies in...
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