You have used the best data available and framed the best and most focused questions you could.

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Question:

You have used the best data available and framed the best and most focused questions you could. What must you keep in mind about using averages?

a. Variation is often hidden by averages, regardless of how good the dataset is.
b. averages will provide you with the most meaningful results
c. if you have a good dataset, you can draw conclusions from summary statistics
d. improbable outliers will be removed when you have a good dataset