Determine whether a “survey”, “observational” study , or “experimental” study would be the best way to collect data to answer the question.

1. Do smokers get in more car accidents than non-smokers?

2. What is the students'
favorite type of sport at this school?

3. Do people who chew gum while studying do better on tests when they chew gum
while taking the test than when they don't chew gum while taking the test?

4. How has the percentage of the world's wealth owned by the top 1% of individuals
changed over the past 300 years?

5. Do strawberry plants produce more fruit when growing in a greenhouse or outside?

6. What are the most important issues for voters in a district at the moment?