Arithmetic Average Return

Visually, T is located at the top right after ∑ and t = 1 is located at the bottom right after ∑ for the first one.
T is located above ∑ and t = 1 is located at the bottom of ∑ for the second one, and there is that small dot after Rit.

Is there a significant meaning to this difference or do they mean the same thing? They are from two different textbooks.
 
Juria said:
Visually, T is located at the top right after ∑ and t = 1 is located at the bottom right after ∑ for the first one.
T is located above ∑ and t = 1 is located at the bottom of ∑ for the second one, and there is that small dot after Rit.

Is there a significant meaning to this difference or do they mean the same thing? They are from two different textbooks.
Click to expand...

Yes, they mean the same. It has to do with type setting.

With enough space, it'll be on top and bottom

\(\displaystyle \bar{Ri} = \dfrac{1}{T}\sum_{t=1}^TRit\)

However, if I do it on the in-line like this, [imath]\sum_{t=1}^TRit[/imath], it'll show on the side.

The dot might just be a period, the end of a sentence.
 
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