question archive The increasing cost of health care is an important issue today
The increasing cost of health care is an important issue today
Subject:StatisticsPrice: Bought3
The increasing cost of health care is an important issue today. Suppose that a random sample of 36 small companies that offer paid health insurance as a benefit was selected. The mean health insurance cost per worker per month was $124 with a standard deviation of $32. Construct a 99% confidence interval for the average health cost per worker per month for all small companies. Descriptive Statistics N Mean 3:Dev SE Mean 99% Cl for u. 36 124.000 32000 5.353 [109.473, 138.527) LC mean of Sample We are 99% confident that the average health care cost per worker per month for all small companies is between $109.47 and $138.53. 2. Salmon Farming. Researchers tested 150 farm-raised salmon for organic contaminants. They found the mean concentration of the carcinogenic insecticide mirex to be 0.0913 parts per million, with standard deviation 0.0495 ppm. As a safety recommendation to recreational fishers, the Environmental Protection Agency's (EPA) recommended "screening value" for mirex is 0.08 ppm. Calculate a 99% confidence interval for the mean concentration of mirex. Based upon your confidence interval, are farmed salmon contaminated beyond the level permitted by the EPA? Justify your answer. Descriptive Statistics N Mean SDev SE Mean 99%% Cl for 150 0.091300 0.040500 0.004042 (0 080754, 0.101846) ic mean of Somepyle
