An article in Computers & Electrical Engineering ("Parallel Simulation of Cellular Neural Networks" (1996, Vol. 22, pp. 61-84)) considered the speed-up of cellular neural networks (CNN) for a parallel general-purpose computing architecture based on six transputers in different areas. The data follow: 3.775302 3.350679 4.217981 4.030324 4.639692 4.139665 4.395575 4.824257 4.268119 4.584193 4.930027 4.315973 4.600101 Construct a 95% two-sided confidence interval on the mean speed-up. Blank 1

The death rate per 100,000 for lung cancer is 7 among nonsmokers and 71 among smokers. The prevalence of smoking in the population is 55%.  Calculate the relative risk of dying from lung cancer for a smoker compared to a nonsmoker. Round to the tenth decimal place.