A dance student wants to know the favorite type of dance class for students at The Dance Academy. She surveys each student in her ballet class. In which way could the results of her survey be most improved?

Surveying only students in her ballet class may not represent students in other dance classes. To make the results more representative of the entire academy, she should sample students from each type of class in proportion to how many students are enrolled in that class. This makes choice B, sampling a proportional number of students in each type of dance class, the best improvement.

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