A graduate student researcher designs a study that will investigate the
effects of a new curriculum on student achievement in high school
mathematics. She creates a final exam with 20 questions. She compares two
samples, each containing 10 randomly selected students. One sample
consists of Algebra I students. The other sample consists of Algebra II
students. Select all weaknesses in the design.
A. More samples need to be compared.
B. The sample size is too small.
C. The samples are not similar.
D. The exam has too few questions.