As part of their work in a psychology research methods class, a group of psychology students devised a survey to assess the relation between stress and health. Each member of the class administered the survey to 12 friends, and the data were then pooled. What method of sampling was used

Use the graph of the sine function y=2sinθ shown below

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

Find the values of the variables in the kite