10 A long-term investigation was carried out into the link between smoking and lung cancer. The smoking habits of male doctors aged 35 or over were determined while they were still alive, then the number and causes of deaths among them were monitored over a number of years. (Note that this survey was carried out in the 1950s - very few doctors smoke these days!) The results are shown in the graph.
a) Write a paragraph to explain what the researchers found out from the investigation.
b) How many deaths from lung cancer would be expected for men aged 55 who smoked 25 cigarettes a day up until their death? How many deaths from lung cancer would be expected for men in the same age group smoking 10 a day?
Answers
a) According to data carried out in the 1950s given by the researchers, In the total of 1000 people ( as a assuming strength ) the no. of deaths caused by the lung cancer. Now understanding the graph. X-axis is the age of persons of a age span of 35 to 74. and Y-axis is the no of deaths caused by lung cancer in the quota ( fixed term ) of 1000 peoples which is 0 to 7 no. from the no of cigarettes people smokes in a day.
b) ( i ) How many deaths from lung cancer would be expected for men aged 55 who smoked 25 cigarettes a day up until their death?
Ans: 7 deaths.
( ii ) How many deaths from lung cancer would be expected for men in the same age group smoking 10 a day?
Ans: 3 deaths.
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