When plotted in a regression analysis the change in average mTTV explains 73.4% of the variation in change in average finish position (see graph below).

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The difference was equivalent to the average variation in cognitive scores between children born at a normal gestational weight and those weighing less than 3.5 pounds, the researchers said.

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But if we recognize that we have such a big variation in Australia, and on average quite a high number, then it is reason enough to have a closer look at what the same assessment would tell us for the other continents.

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Crucial variables for such forecasts, like the average time from infection to disease in people, or the variation around that average, simply cannot be determined yet.

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Please note, the variation between girls and girls and boys and boys, men and men, women and women, is greater than the variation between the average boy and girl, man and woman, in these attitudes.

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Mr Aisbitt noted that Australia's All Ordinaries Index has varied by 14.6% in the last 30 days, from an average 30-day variation during the last year of 15.5%.

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