Two cities each had a population of 1,000,000 in 2010, with the same number of lung cancer-related deaths occurring in the year. Although the prevalence of smoking was 40% for each city, the number of all-cause deaths in Jones Country was a third of that for Bryanville. If the number of all-cause deaths in Jones Country was 50 with 8% of them associated with lung cancer.   What is the proportionate mortality ratio for lung cancer deaths for Jones Country (compared) to Bryanville? Answer to 1 decimal place

13.

In 2011, the city of Calgary had 1,096,833 people living within the city limits. Since then, there have been 245,678 births and 189,753 deaths. A total of 159,753 people moved to Calgary from other cities or countries, while only 12,354 people moved away from Calgary.    How did the population of Calgary change since 2011?    Express your answer using scientific notation in the form of x.yz x 10d people.

In a cohort study, men were classified as having high or low cholesterol levels. Among the group with low cholesterol levels there were 50 heart attacks in 5000 person-years of follow-up and among the group with high cholesterol levels there were 150 heart attacks in 6000 person-years of follow-up.   1. What was the incidence of heart attack among men with low cholesterol levels? 2. What was the incidence of heart attack among men with high cholesterol levels?  3. What was the incidence of heart attack all men?  4. If high cholesterol levels are a cause of heart attack, what proportion of heart attacks in men could theoretically be prevented if nobody had a high cholesterol level?