Question

According to the National Household Survey on Drug Use and Health, when asked in 2012, 41% of those aged 18 to 24 years used cigarettes in the past year, 9% used smokeless tobacco, 36.3% used illicit drugs, and 10.4% used pain relievers or sedatives. Explain why it is not correct to display these data in a pie chart.

a. The types of illicit drugs are not given.
b. There could be roundoff error.
c. The three groups do not add up to 100%.
d. There have to be more than three categorical variables.
e. There could be overlap between the groups.

Answer 1

Option c

Explanation:

given that according to the National Household Survey on Drug Use and Health, when asked in 2012, 41% of those aged 18 to 24 years used cigarettes in the past year, 9% used smokeless tobacco, 36.3% used illicit drugs, and 10.4% used pain relievers or sedatives.

When we add up these we get

`41+9+36.3+10.4 = 96.7`

Since these do not add upto 100 we have to find out the remaining first before doing pie chart

For construction of pie chart total area in percent should be 100.

So option c is right.