The answer depends on what X is meant to represent.
a sample is a sample sized piece given... a sample size is the amount given in one sample
An experimental sample is an experiment that is just a sample of what you are looking for.
sample is a noun and sampling is TO sample(verb)
The sample mean may differ from the population mean, especially for small samples.
The full set of data from which a subset (sample) is taken.
Suppose you took a sample of someone's blood in a tube then noticed a crack in the tube. You would be doubtful of the integrity of the sample because the crack might harbour contaminants that would cast doubt on measurements.
The term is "representative sample." It is a subset of a population that accurately reflects the characteristics of the whole population it is meant to represent.
A sample of a fabric design is usually a square of the material that is a 3Õ x3Õor a 4Õx4Õ is size. It is meant to be paid out on what you are using the fabric for to get an idea of what the item would look like in the fabric.
The answer depends on what X is meant to represent.
I believe you meant to ask: What distinguishes a random sample from a non random sample? A random sample means the selection or sampling from the population is by chance. Looking at the data, one might not be able to tell if the sample is random or selective. Consider a marketing survey which is included everytime you buy an item online. Random or non-random? It is a survey of recent customers, and probably a pretty good one. But it is not a random selection of all customers who have made purchases with clients.
You're not meant to have foreign organisms inside your body (excluding the gut which technically isn't inside your body). So if you're sick and the organism can be isolated and cultured from a sample you gave from the area that is affected (eg a sputum sample if you have a chest infection, a blood sample if you have septacaemia), it has to be the cause of the disease. A control sample is always given to exlude the possibility of contamintation.
When you choose something at random... like if you have 2 blue socks and 1 white sock what sock are you more likey to choose...... blue
Aliquot is a known part extracted from a volume of sample.
random sample is a big sample and convenience sample is small sample
As the question is phrased, the answer is 1, because there is only one element in a sample of the element. If the questioner meant "How many atoms" instead of "How many elements", the answer is Avogadro's Number, 6.022 X 1023.
The half-life of a radionuclide is the time it takes for half of the radioactive atoms in a sample to undergo radioactive decay. It is a characteristic property of the radionuclide and can be used to determine the rate at which it decays.