(AT) Does performance increase linearly with dosage?
a. Plot a line graph of this data.
b. Compute L for each patient. To do this, create a new variable where you multiply the following coefficients by their corresponding dosages and then sum up the total: (-3)d0 + (-1)d15 + (1)d30 + (3)d60 (see #7). What is the mean of L?