A teacher found that students concentrated for longer in class if the teachers wore purple. She had a sample size of 48 and a p-value of 0.20. Does the teacher recommend that all teachers start wearing purple?
A. Yes, because the sample has low confidence levels.
B. No, because the sample size is large and therefore the p-values are accurate.
C. Yes, because statistical significance has nothing to do with sample size.
D. No, because the sample size is small and p-values are easily affected by sample size.
Answer: D
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