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If these means are unknown, then it sometimes pays to estimate these from a large preliminary sample that is subsampled in the second phase.
Suppose that Y1, Y2,..., Y k are independent normal random variables and these k random variables all have a common known variance, but their means are unknown and different.
Similar(58)
Just how the Americans reached such a definitive conclusion — whether, for instance, they were able to positively establish his identity through fingerprints or some other means — is unknown.
The W380i (not 3G) will be an improvement over the W300i and is thought to contain a feature called "gesture control," although what that means is unknown at this point.
What that means is unknown.
He subtitled it "Delmo", however what this means is unknown.
In practice, the population mean (the mean of all sample means) is unknown but there is an extremely useful quantity, known as the 95% confidence interval, which can be obtained in the same way.
This phylogenetic study demonstrates that the viruses from groups II and V that have been responsible for FMD outbreaks in China appear to have spread large distances in a short time, although the means is unknown.
The effect of increased adiposity has been proposed as a modifying factor in the response to dietary nitrate, by means that are unknown [ 21].
For Figure S2, we assumed that both gene-conversion rates and mean tract lengths are unknown and estimated them jointly.
In the absence of replicates, the intensity distributions for individual genes (and, therefore, the distribution mean and variance are unknown.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com