What statistical test could the scientists use to determine whether there was a significant relationship between the amount of CD20 on the surface of B cells and the percentage of B cells destroyed by Rituximab? Name of test ___________ Reason _________ From these data, what can you conclude about the effectiveness of Rituximab in treating patients with CLL? Do not include considerations of statistical analyses in your answer - AQA - A-Level Biology - Question 2 - 2018 - Paper 3

This test is suitable as it measures the strength and direction of the linear relationship between two continuous variables: the amount of CD20 on the surface of B cells and the percentage of B cells destroyed by Rituximab.

The data suggests that Rituximab is more effective in treating patients with higher amounts of CD20 on B cells, as it leads to a greater percentage of B cell destruction. However, the variability among patients indicates that while higher CD20 levels correlate with better treatment outcomes, it does not guarantee complete effectiveness, as not all B cells are destroyed.