Question

A linear relationship between the dosage of a new

chemotherapeutic drug and the degree of pulmonary function is

being investigated. Measurements of the forced expiratory

volume in 1 second are collected as a measure of lung function

and plotted against the corresponding dosage of drug each

patient received. Which one of the following is the most likely

or appropriate statistical approach to assess any correlation

between drug dose and forced expiratory volume in 1 second?

A. Pearson product moment* coefficient

B. ANOVA

C. Spearman

D. ANCOVA

Answer 1

Pearson product moment* coefficient is the most appropriate statistical approach to assess any correlation between drug dose and forced expiratory volume in 1 second since it is a measure of the strength of the linear association between two variables and attempts to fit a straight line of best fit through the data of the two variables(drug dose and forced expiratory volume in our case) which is what we are trying to do here.

Hence Pearson product* moment coefficient is the correct answer.