Determine the sample proportions.(b)Decide whether using the two-proportions z-procedures is appropriate.If so,also do parts(c) and (d).(c)Use the two-proportions z-test to conduct the required hypothesis test.(d)Use the two-proportions z-interval procedure to find the specified confidence interval.
11.82 x1=10,n1=20,x2=18,n2=30,left-tailed test, ?=0.10;80%confidence interval
11.84 x1=14,n1=20,x2=8,n2=20;right-tailed test, ?=0.05;90% confidence interval
11.86 x1=18,n1=30,x2=10,n2=20,two-tailed test, ?=0.05;95% confidence interval