34.7 Quick review questions
A study of Chinese paedatric patients (Wong et al. 2018) studied the relationship between the 6-minute walk distance (6MWD) and maximum oxygen uptake (VO2max) for \(n=29\) patients. The correlation coefficient is reported as \(r=0.457\), and the corresponding \(P\)-value as \(P=0.013\).
- The \(x\)-variable is
- True or false: Since the \(P\)-value is small, the correlation must be quite strong.
- The relationship is best described as
- The value of \(R^2\) (to one decimal place, expressed as a percentage) is:
- For statistical validity, we need to assume that: