- AA has the higher mean
- BIt cannot be found
- CBoth have mean 45
- DB has the higher mean
Step-by-Step Solution
A: 40 + 50 + 30 + 60 = 180, mean 45. B: 35 + 65 + 55 + 25 = 180, mean 45. They are equal, even though B's scores are more spread out.
Answer: C) Both have mean 45