Imagine we took a group of smokers, recorded the number of cigarettes they smoked each day, whether they wanted to quit smoking or not, and then split them randomly into one of two 6-week interventions; 'hypnosis' or 'nicotine patch'. After the 6 weeks, we again recorded how many cigarettes they smoked each day and subtracted this number from the number of cigarettes they each smoked pre-intervention, to produce an intervention success score for each participant. Out of the following options, which would be the best method of looking at which intervention was the most successful, taking into account whether the participant wanted to quit or not?
A)Clustered boxplot
B)Frequency polygon
C)Simple histogram
D)Population pyramidb.

Question

Quizplus · Accepted Answer

A clustered boxplot can be used to compare the success scores for each intervention group while also taking into account whether the participant wanted to quit or not. The boxplot can be split into two groups based on whether the participant wanted to quit or not, and then further split by intervention group. This will allow for a visual comparison of the success scores within each group and intervention.

Imagine We Took a Group of Smokers, Recorded the Number