Question

For questions 20-22, use the following information. Suppose the annual expected mortality rate from lung cancer is 45 per 100,000 individuals.

20. In a specific community of 300,000 individuals, how many deaths are expected to be attributed to lung cancer over a one-year period?

21. The actual (observed) number of deaths attributed to lung cancer in the community was 180 individuals over a one-year period. What would be the observed/expected ratio for these deaths? Please reduce to the simplest form.

22. Of the 180 individuals that died from lung cancer, it was determined that twice the number of smokers died from it than nonsmokers. How many smokers died from lung cancer?

Answer 1

Answer:

20.

To give expected number of deaths

Expected deaths = 300,000*45/100,000

= 135

Expected number of deaths = 135

21.

observed/expected ratio = 180 / 135

= 1.33

Ratio = 1.33

22.

Here it is given,

Of the 180 individuals that died from lung cancer, it was determined that twice the number of smokers died from it than nonsmokers.

i.e.,

let us consider,

No. of males died = x

Females dies = 2x

So now,

x + 2x = 180

3x = 180

x = 180/3

x = 60

So 60 male people died.