Consider the following data set:
The data is also provided in Q8-1.rda (the data frame is called Q8).
- Plot the data, draw the regression line and estimate the equation of the line
- What is the correlation coefficient?
- Interpolate the y-value for x = 5.5
- Extrapolate the y-values for x = 0.1 and x = 15
Consider the extended data set below:
The data is also provided in Q8-2.rda (the data frame is called Q8Extended).
A Study is undertaken to validate the use of an iPhone inclinometer to measure knee flexion. The ‘Gold Standard’ is a Lafayette Long-Armed Goniometer. Multiple knee flexion angles are measured with each device and the paired data are provided in the file goniometer.rda.