Answer
$7$ points
Work Step by Step
Having the dataset file already imported into our spreadsheet calculator, we invoke the descriptive statistics feature of the Data Analysis add-on for the column labeled "Control", as illustrated in the screen snip below.
The information we obtain is:
The median, representing the median improvement score for the control group under which we find approximately $ 50\%$ of the $37$ observations, is $7$ points.
