Sentences with phrase «percent of these false positives»

Not exact matches

The researchers realized that one particular analysis variation was spitting out false positives at a rate of up to 70 percent.

In fact, about 10 percent of all «Kepler Objects of Interest» (KOIs) will end up as false positives, mission scientists say, while others will suffer demotions like that of KOI 326.01 based on follow - up observations.

One common misinterpretation is that a P value of.05 implies a 95 percent probability that the effect is real (or, in other words, that the chance of a false positive is only 5 percent).

If the data yield a P value of.05, the risk of a false positive is 26 percent, Colquhoun calculates.

Because ovarian cancer is relatively rare, occurring in approximately one out of every 2,500 women, a test with only 99 percent specificity would result in false - positive diagnoses for 25 women, leading to unnecessary and risky surgeries and procedures.

If you're testing a long shot, say with a 10 percent chance of being effective, the false positive risk for a P value of.05 is 76 percent.

If your goal is a 5 percent risk of a false positive, you need a prior probability of 87 percent when the P value is.05.

Results of a multi ‐ center clinical study found a 31 percent reduction in unnecessary biopsies due to false ‐ positives as a result of using the phi test.1

And although they only have an efficiency of about 7 percent (of every 100 photons that enter the pupil, only about seven go on to reach the retina) they have a dark count of virtually zero, meaning they generate few if any false positives.

It achieved a 97 - percent detection accuracy and less than 0.1 percent false positive rate, regardless of its position on the body and the user's language, accent or even mobility.

Satta also found that images could be accurately grouped according to the originating camera 90 percent of the time, with a false - positive rate of 2 percent.

The data on the numerous candidates are somewhat preliminary and require validation, but a new analysis by a pair of astrophysicists at the California Institute of Technology suggests that the percentage of false positives among Kepler's candidate planets may be less than 10 percent.

That same story, from National Public Radio, also reported that those screened face frightfully similar risks as women do with mammograms: a 24 percent chance of a false positive and perhaps having a needle needlessly plunged into the chest for a biopsy.

They determine, using these calculations, 1 percent of the 1,284 verified planets will be false - positives.

After adjusting for common factors that influence breast cancer risk, Henderson and colleagues found that women whose mammograms were classified as false - positive who were referred for additional imaging had a 39 percent increased chance of developing subsequent breast cancer during the 10 - year follow - up period, compared with women with a true - negative result.

Prior studies have shown that about 16 percent of first mammograms and 10 percent of subsequent mammograms will generate a false - positive result.

Women whose mammograms were classified as false - positive but were referred for a breast biopsy had a 76 percent increased chance of developing subsequent breast cancer compared with women with a true - negative result.

Less than 3 percent of the time did it produce a «false positive» result, which mistakenly indicates the presence of cancer when there is none.

About 10 percent to 15 percent of people have so - called «false - negative» blood test results (negative blood test results but a positive biopsy) even when they're eating a gluten - filled diet, according to Dr. Alessio Fasano, head of the Massachusetts General Hospital Center for Celiac Research.

[14] Thus the tradeoff associated with the reduction of false negatives is that false positive error increased from 56 percent to about 70 percent.

«If VAM were 100 percent accurate I would still have a problem with it — but it's not, there are a lot of false positives and false negatives.»

IDEXX claims that the Spec cPL test has a sensitivity greater than 95 percent, meaning almost every dog with pancreatitis will test positive (fewer than 5 percent false negatives), and a specificity also greater than 95 percent, meaning fewer than 5 percent of dogs who don't have pancreatitis will have a false positive result.

In fact, results from a two - year study reported by the National Press Club of Washington, DC found that as many as 70 percent of field tests for narcotics rendered false - positives.

Kaspersky stopped 99.4 percent of malware in July, and 99.7 percent in August, with no false positives in either month.

The false positive rate is low, between 1 and 10 percent of all positive results, but unfortunately, such a result can lead to more invasive treatment that might in reality be unnecessary.