Final answer:
3,161 people in attendance would prefer ketchup on a hot dog.
Step-by-step explanation:
Based on the data in the sample, we know that 63 out of 150 people prefer ketchup on a hot dog. To find out how many of the people in attendance would prefer ketchup, we can set up a proportion:
Ketchup preference in sample = Ketchup preference in population
63/150 = x/7525
From this proportion, we can cross multiply:
150x = 63 * 7525
x = (63 * 7525) / 150
x = 3157.5
So, approximately 3158 people in the attendance would prefer ketchup on a hot dog.
Therefore, the correct answer is 3,161.