Card 25 / 54: When Sam looked at the data, she found that the mean music test score after training for Group A was 70.4, and the mean test score for Group B after training was 55.8. Sam concludes that Group A had better musical ability after the experiment. Which of the following details would be a reason for Prof. Higgins to be skeptical of Sam's conclusion?
A) A small number of participants in Group A had much higher scores than the rest of that group.
B) A small number of participants in Group B had much higher scores than the rest of that group
C) Many people in Group B had exactly the same score on the test.
D) The lowest score in Group A was lower than the highest score in Group B)

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