Data Interpretation

Detailed Solution

79. The percentage who smoked in the 60+ age group fell from 30% to 14%, a fall of 16%.
16% is more than half of 30%. The percentages for the other age range fell by less than half.

80.

81. A person born in 1956 would have been 22 years old (in the 20 - 24 age group) in 1978 and 42 years old (in the 35 - 49 age group) in 1998.
The percentage of 22 year olds who smoked in 1978 was 44%
The percentage of 42 year olds who smoked in 1998 was 30%
Therefore ON average 14% gave up smoking between 1978 and 1998.

82.

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