#### Answer

a)low: 20.0%, normal 48.9%, high 31.0%.
b) The table of conditional distribution is attached.
c) Chart attached.
d) As age increases, the blood pressure of adults will also increase. By contrast, the percentage of adults of low blood pressure will decrease.
e) No, but it gives an indication that it might be possible. We need to track the same individuals over time.

#### Work Step by Step

In order to calculate a percentage, first divide the number in the given category by the total number. Then, express this fraction in decimal form. Finally, multiply by 100% to express this number as a percentage.
Create a chart in MS Excel using the given data.