I need help with d, e , f , and h

1. {15 points} A recent article1 claims that \"Green Spaces Maire Kids Smarter.\" The study described in the article involved 2,523 schoolchildren in Barcelona. The researchers mea- sured the amount of greener around the children's schools, and then measured the children's working; memories and attention spans. The children who had more vegetation around their schools did better on the mun-org.r and attention tests. (h) Describe the design of a study that might allow us to make the conclusion in part (f).(d) What graph(s) might be used to display the association, if any, between the two vari- ables? "Macintyre CR, Seale H, Dung TC, et al, "A cluster randomised trial of cloth masks compared with medical masks in healthcare workers," BMJ Open, 5 (4), 2015. (e) Let p1 = the sample proportion in the medical mask group that developed CRI; p2 = the sample proportion in the cloth mask group that developed CRI. Find p1, p2, and the pooled proportion p. Use three decimal places. (f) State appropriate hypotheses to test whether medical masks are more effective at pre- venting clinical respiratory illness than cloth masks. Ho : Ha : (g) What is the value of the Z-statistic (or test statistic)