Practice Test 3

A cafeteria manager wants to predict which snack is more popular among all students. In a random sample of 80 students, 46 choose pretzels and the rest choose popcorn. Based on this sample, what is the best prediction about the whole school?

A science class wants to estimate the average mass of the rocks in a large bucket. They randomly select 15 rocks and find a mean mass of 180 grams. Which conclusion is most reasonable?