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QUESTION:

High blood pressure is unhealthy. Here are the results of one of the studies that link high blood pressure to death from cardiovascular disease. The researchers classified a group of white males aged 35 to 64 as having Low blood pressure or High, then followed the subjects for five years.

The following two-way table gives the results of the study:

Blood Pressure
LowHighTotal
Cardiovascular Death?Yes

21

55

76
No

2655

3283

5938
Total267633386014

In this example, it would be appropriate to calculate:

ANSWER:

 conditional column percentages

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