Answer:
The number of degrees of freedom corresponding to within treatments is (a) 60.
Step-by-step explanation:
The number of treatments involved in the experiment is, <em>k</em> = 5.
Each treatment has 13 observations recorded.
The total number of observations is, 5 × 13 =65
The degrees of freedom for between treatment and within treatment are:

Compute the degrees of freedom for within treatment as follows:

Thus, the degrees of freedom for within treatment are 60.