[Answered]: Exercise 1. Comparing two-sample hypothesis test of p

Exercise 1. Comparing two-sample hypothesis test of proportions. (tip: read professor notes, use the calculator provided in this class) You are the administrator of surgical practice in a hospital. You reviewed a study published by a colleague in another hospital who implemented a new protocol for all surgical procedures. The protocol was reported as being associated with a reduction in post-operative complications. You decided that the potential cost reduction and increased reputation for quality were well worth conducting your own experiment with this protocol. You randomly assigned use of the “new” protocol to 100 surgical procedures and compared the post- surgical complications to those from 75 surgical procedures using the current protocols. Using the new protocol, post-surgical complications developed in 5 of the cases, whereas post-surgical complications developed in 10 of the cases in which the current protocol was used. Using a hypothesis test at a 95% confidence level, did the new protocol probably result in a reduction in post-surgical complications?