Quotes & Sayings About Standard Deviation

Clearly, there's a real onus on you to do something correctly when everybody, at least in the United States, had a really clear, specific idea of what this guy looked like - and even more so, what he looked like as Clark Kent and as Superman. You have this whole vast audience of people who would be acutely aware of any deviation whatsoever and probably holding you to a slightly higher standard as a result. — Ben Affleck

In the financial world, risk translates to uncertainty. It's measured by "standard deviation from the norm" -- in other words, it's measured by how much the returns swing up and down. Says King, "Most individuals measure risk as their chance of loss, but we measure risk by the variability of returns. — Kathy Kristof

If you want to make money at some point, remember this, because this is one of the reasons startups win. Big companies want to decrease the standard deviation of design outcomes because they want to avoid disasters. But when you damp oscillations, you lose the high points as well as the low. This is not a problem for big companies, because they don't win by making great products. Big companies win by sucking less than other big companies. — Paul Graham

If your broker or investment advisor is not familiar with the concept of standard deviation of returns, get a new one. — William J. Bernstein

Conclusions
I. A curve has been found representing the frequency distribution of standard deviations of samples drawn from a normal population.
II. A curve has been found representing the frequency distribution of values of the means of such samples, when these values are measured from the mean of the population in terms of the standard deviation of the sample ...
III. Tables are given by which it can be judged whether a series of experiments, however short, have given a result which conforms to any required standard of accuracy or whether it is necessary to continue the investigation. — William Sealy Gosset

Look, cell phone geolocation data shows very few clustering anomalies for this hour and climate. And that's holding up pretty much across all major metro areas. It's gone down six percentage points since news of the Karachi workshop hit the Web, and it's trending downward. If people are protesting, they aren't doing it in the streets." He circled his finger over a few clusters of dots. "Some potential protest knots in Portland and Austin, but defiance-related tag cloud groupings in social media put us within the three-sigma rule - meaning roughly sixty-eight percent of the values lie within one standard deviation of the mean. — Daniel Suarez

The value for which P=0.05, or 1 in 20, is 1.96 or nearly 2; it is convenient to take this point as a limit in judging whether a deviation ought to be considered significant or not. Deviations exceeding twice the standard deviation are thus formally regarded as significant. Using this criterion we should be led to follow up a false indication only once in 22 trials, even if the statistics were the only guide available. Small effects will still escape notice if the data are insufficiently numerous to bring them out, but no lowering of the standard of significance would meet this difficulty. — Ronald A. Fisher

For all live births, the mean pregnancy length is 38.6 weeks, the standard deviation is 2.7 weeks, which means we should expect deviations of 2-3 weeks to be common. — Allen B. Downey

liter. The correlation value, r, will be the same for either set of units. Note however that the slope of the regression line won't be the same since And the standard deviation parts of the equation still have units baked into them. Correlation Takeaways We did a lot of looking at equations in this section. What are the key takeaways? The — Scott Hartshorn

In fact, the average programming manager would prefer that a project be estimated at twelve months and take twelve than that the same project be estimated at six months and take nine. This is an area where some psychological study could be rewarding, but there are indications from other situations that it is not the mean length of estimated time that annoys people but, rather, the standard deviation in the actual time taken. Thus, most people would prefer to wait a fixed ten minutes for the bus each morning than to wait one minute on four days and twenty-six minutes once a week-. Even though the average wait is six minutes in the second case, the derangement caused by one long and unexpected delay more than compensates for this disadvantage. If — Gerald M. Weinberg

125.00% Mean 149.17% Standard Deviation 43.47% — Simon Quellen Field

Sorry, the points are already deducted. And taking into account his schedule, and then the standard deviation from the average man's schedule, I figure ninety percent of his time would go elsewhere. I'd never get uninterrupted coitus." "Penis math," Amy said. "Impressive." She looked at Mallory. "See, this is why a guy shouldn't date an accountant. — Jill Shalvis

One of the most robust sex differences in personality research is the finding that women are higher in Agreeableness than men are. The difference is over half a standard deviation, which means that although there is plenty of overlap between the sexes, the average man scores lower than 70 per cent of women. Women have an advantage on theory of mind tasks too. Moreover, there is evidence that the difference is deep in our biology. When women are given testosterone experimentally, it reduces empathetic behaviour.19 — Daniel Nettle

Now quantitatively we rank things on something called alpha over standard deviation, which is the return independent of the market divided by volatility. Usually, to get a high ranking, you need some buying pressure. — Louis Navellier