One way people have tried to stop smoking is switch to

Last updated: 7/21/2022

One way people have tried to stop smoking is switch to electronic cigarettes. A group of 50 smokers were randomly chosen. 25 continued to smoke cigarettes and 25 were given electronic cigarettes to smoke. The white blood cell count was taken before and after 20 minutes of smoking for each group and compared. What type of statistical survey is this? experimental none of the answer choices survey observational