The phrase "about this ratio" is correct and usable in written English.
You can use it when discussing or referencing a specific ratio in a mathematical, statistical, or analytical context.
Example: "The results of the experiment were surprising, and we need to gather more data about this ratio to understand its implications."
Alternatives: "regarding this ratio" or "concerning this ratio".
I thought about this ratio thing, too, during a meal back at Trattoria Monti, which I've written about on this blog before, which I love.
(To learn more about this ratio, see Understanding The Sharpe Ratio).
An important subtlety about this ratio, not well understood by most investors, is that it mixes chronological apples and oranges.
So … If I am thinking about what this ratio becomes as n gets really, really big.
Or equal to 1. [The UM's need for precision emerges] So … If I am thinking about what this ratio becomes as n gets really, really big.
In Fig. 4d f, the function values in the x and y directions are zero when r / D reaches 0.16, while the function for the z-direction is zero when r / D is about 0.3; this ratio is almost identical with that of the coin-shaped insulation, and it is examined that the probability functions used here can be effectively used to describe the directional characteristics of insulation materials.
The ratio between the smallest and largest plates in Meade and Hager is only about 11 whereas this ratio is about 34 for the plates in Bird and Rosenstock.
From about 2004 onwards, this ratio moved to a much higher level, suggesting it is now very easy to buy financial assets.
As can be seen from Figure 5c, this ratio is about 1.5 to 1 in our data.
The male to female ratio for oesophageal and cardia adenocarcinoma is about 6 7 to 1, whereas this ratio is about 2 3 to 1 for non-cardia gastric adenocarcinoma (Fuchs and Mayer, 1995; Parkin, 2001).
In normal conditions this ratio is about 0.5 at functional residual capacity, because the chest wall elastance and the lung elastance are similar.
