Correct answer
Question 1
0..5 pts
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?
Simple histogram
Clustered boxplot
Frequency polygon
Population pyramid.
Correct answer
Question 2
0..5 pts
,Approximately what is the median success score for those in the hypnosis
group who did not want to quit?
-1.00
2.00
1.00
0.00
, Correct answer
Question 3
0..5 pts
Which of the following statements best describes the graph below?
The graph looks fairly symmetrical. This indicates that both groups had a
similar spread of scores before the intervention.
The graph looks fairly asymmetrical, indicating that the two groups are
from different populations.
The graph shows that for those who used nicotine patches there is a fairly
normal distribution, whereas those who used hypnosis show a skewed
distribution, where a very small proportion of people (relative to those using
nicotine) smoke more than 2 cigarettes per day.
Question 1
0..5 pts
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?
Simple histogram
Clustered boxplot
Frequency polygon
Population pyramid.
Correct answer
Question 2
0..5 pts
,Approximately what is the median success score for those in the hypnosis
group who did not want to quit?
-1.00
2.00
1.00
0.00
, Correct answer
Question 3
0..5 pts
Which of the following statements best describes the graph below?
The graph looks fairly symmetrical. This indicates that both groups had a
similar spread of scores before the intervention.
The graph looks fairly asymmetrical, indicating that the two groups are
from different populations.
The graph shows that for those who used nicotine patches there is a fairly
normal distribution, whereas those who used hypnosis show a skewed
distribution, where a very small proportion of people (relative to those using
nicotine) smoke more than 2 cigarettes per day.
