Based on the table, out of the 50 students surveyed, 30 own at least one cat or dog. Therefore, if we assume that the 50 students surveyed are representative of the entire population of 450 students at the school, we can use this information to estimate the proportion of students who own at least one cat or dog in the school.
To do this, we can set up a proportion:
30 / 50 = x / 450
where x represents the number of students in the school who own at least one cat or dog. To find x, we can cross-multiply and solve for x:
30 * 450 = 50 * x
x = 135
Therefore, we would predict that approximately 135 of the 450 students in the school own at least one cat or dog, based on the data collected from the 50 students surveyed by Hannah.