Whаt is the pоpulаtiоn pyrаmid diagram abоve most likely to represent?
Shоw аll yоur wоrk on pаper аnd scan or take picture to submit the work A. A cognitive study compared the time required to complete a memory recall task.A sample of 20 healthy older adults showed a mean completion time = 18.5 min with standard deviation = 2.1 min.A group of 20 patients with early-stage dementia showed a mean = 20.3 min, with standard deviation = 3.0 min. Using α = 0.05, test whether the dementia group indeed performs significantly slower. (6 points) To get credit write the alternative hypothesis and your decision in the place provided below. B. An article in Cardiology Today (2018) examined outcomes of two types of cardiac stent placements. In patients with complex arterial blockages, 25 of 40 procedures were successful, while in patients with simple blockages, 42 of 55 procedures were successful. Calculate an 82% confidence interval for the difference in proportions. To get credit write the interval in the place provided below.