Which of the following is true?
Explanation:
We need to look at histogram to interpret the answer.
The histogram for performance_caff and performance_plac is left skewed which will shift median to right side compared to the mean.
The situation is opposite in case of arousal_caff.
Furthermore, arousal_plac‘s histogram is not symmetric and hence, there is no guarantee of its mean and median being equal.
Hence, options 2, 3, 4 and 5 are incorrect.
Hence, option (a).
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