Ten needles were randomly selected from a branch of a loblolly pine tree. The stomata (microscopic breathing holes) are arranged in rows. On each needle, four rows are randomly selected and the number of stomata per centimeter for each of the rows was determined. The data below is in the file named stomata. dat on Bb, Column 1 for Needle and Column 2 for numbers of stomata per centimeter. a. Why is the random effects model appropriate here