1. It is found that there are 6 fatal accidents in an underground coal mine for a sample of 20,000,000 employee hours of exposure. Place an approximate 80% confidence interval on the Poisson parameter if the interval is 100,000 employee hours.
2. In the quality control process described in place an approximate 90% confidence interval on the smallest mean number of pellets expected in 1 scoop if 7 pellets are found in 4 random scoops.