Dictionary » V » Variance

Variance

variance

1. The state of being variable, different, divergent, or deviate; a degree of deviation.

2. A measure of the variation shown by a set of observations, defined as the sum of squares of deviations from the mean, divided by the number of degrees of freedom in the set of observations.


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ELISA readings after booster shot

... occur with new reagent or between lots of same reagent. Also check your expiration dates on everything to see if you can discover a reason for the variance. Did you save some immediately frozen serum from the pre to test again alongside the post, using exactly the same reagent same method same ...

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by Wallyanna
Wed May 09, 2012 11:07 am
 
Forum: General Discussion
Topic: ELISA readings after booster shot
Replies: 3
Views: 2934

Experimental evidence for evolution

... force maintained anisogamy . Here, we empirically test this prediction directly by using selective breeding to generate controlled and independent variance in sperm size and number traits in the cricket Gryllus bimaculatus. We find that sperm size and number are male specific and vary independently ...

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by einfopedia
Fri Mar 30, 2012 10:48 am
 
Forum: Evolution
Topic: Experimental evidence for evolution
Replies: 103
Views: 179669

Reproductive Isolation

How does variance can result in reproductive isolation as a secondary consequence of natural selection? Heres my attempt: Natural selection can favor two extreme phenotypes, and select against against the majority. This can result ...

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by ReMuSoMeGa
Thu Feb 02, 2012 6:51 am
 
Forum: Evolution
Topic: Reproductive Isolation
Replies: 0
Views: 1655

Re: Theories - Origin of Life

... of the host cell by binary division, similar to bacteria. There are several problems with it. For example the mitochondria’s genetic code is at variance with the standard DNA code. The codon UGA is a stop codon in the standard code, but encodes for Tryptophan in mitochondria. ( I have covered ...

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by scottie
Mon Jan 30, 2012 3:56 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929094

Biology Question

... definition? Statistical hypothesis stating that there is no difference between means of two samples of measurements is? A –Standard Deviation B – Variance C – Alternative Hypothesis D – Standard Error or the Mean E – Mean F – Null Hypothesis

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by Terra
Mon Jan 30, 2012 4:48 am
 
Forum: General Discussion
Topic: Biology Question
Replies: 0
Views: 921
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