A liver disease study follows 500 adults who drink little alcohol and 500 adults who drink large amounts. There are 10 cases in the first group and 35 in the second group.
Which statement correctly describes the difference between the percentages affected and the conclusion supported?
The difference is 9 percentage points; higher alcohol intake is associated with lower risk.
The difference is 5 percentage points; higher alcohol intake is associated with higher risk.
The difference is 5 percentage points; higher alcohol intake is associated with lower risk.
The difference is 9 percentage points; higher alcohol intake is associated with higher risk.
44 exam-style questions on Edexcel GCSE Biology 5.4 Non-communicable diseases, covering 5.4.1 Interaction of factors in non-communicable disease, 5.4.2 Lifestyle factors and non-communicable disease, and 5.4.3 Treatments for cardiovascular disease. Each one has a worked solution and a mark scheme showing where the marks go.