Mathematics, 21.03.2020 02:59 nicole5918
Parrots can develop cognitive issues as they get older. This may compromise their memory, ability to learn, awareness, sight, and hearing. A researcher wishes to conduct a study to find which of two medicines, Medicine A or Medicine B, is more effective in improving cognitive health. A total of 150 parrots that are at least 12 years old will be randomly selected from sanctuaries around the United States. The researcher will get consent from all owners, treat the parrots for 1 year, and evaluate changes in cognitive health.
Part A: How would the study benefit from adding a control group? (2 points)
Part B: What is the best way to randomly place the parrots into the Medicine A, Medicine B, and control groups? (4 points)
Part C: The researcher wants to use a blocking variable to place the parrots into groups instead of doing it randomly. He decides to block either by breed or sanctuary. Explain which would be the best blocking method. (4 points)
Answers: 2
Mathematics, 21.06.2019 13:50, floverek
Avegetable garden and a surrounding path are shaped like a square together are 12 ft wide. the path is 1 feet wide. if one bag of gravel covers 8 square feet, how manu bags are needed to cover the path? round your answers to the nearest tenth.
Answers: 1
Mathematics, 21.06.2019 17:30, astultz309459
Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression
Answers: 2
Mathematics, 21.06.2019 19:40, evarod
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
Parrots can develop cognitive issues as they get older. This may compromise their memory, ability to...
Geography, 21.11.2020 01:10
Mathematics, 21.11.2020 01:10
Mathematics, 21.11.2020 01:10
Mathematics, 21.11.2020 01:10
Arts, 21.11.2020 01:10
Engineering, 21.11.2020 01:10