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What is an rf value used for?
The rf value is shorthand for the retention value of a substance. It is used in chromatography to determine the components of an unknown sample.
When to you use a z-scores or t-scores?
T score is usually used when the sample size is below 30 and/or when the population standard deviation is unknown.
What is the difference between t-distribution and standard normal distribution?
the t distributions take into account the variability of the sample standard deviations. I think that it is now common to use the t distribution when the population standard deviation is unknown, regardless of the sample size.
In statistics what is Pi used for?
In statistics, pi represents the population proportion of successes. Using p, the sample proportion of successes, inferences can be made about pi, although it is usually unknown.
What is the difference between sample and sample size?
a sample is a sample sized piece given... a sample size is the amount given in one sample
A 22.0 gram sample of an unknown gas occupies 11.2 liters at STP What is the identity of the gas?
CO2
When was Identity Unknown created?
Identity Unknown was created in 1945.
What is the duration of Identity Unknown?
The duration of True Identity is 1.55 hours.
What is the identity of the unknown cation?
What is a unknown cation
What are the ratings and certificates for Identity Unknown - 1960?
Identity Unknown - 1960 is rated/received certificates of: UK:U
What is a flame tested used for?
To identify an unknown sample by its emission spectrum
A sample has a mass of 612 grams and a volume of 78 cm3 What is the identity of the sample?
The first reference I consulted on line lists the density of gold as 19.32 gm/cm3,whereas the density of your sample is 19.286 gm/cm3.
Who is Sofia gubaidulina?
unknown identity
An 8.192-mL sample of an unknown has a mass of 9.02gWhat is the density of the unknown?
1.10
What is the components of unknown polysaccharide sample?
peptidoglycon chain
What are the release dates for Inner Sanctum - 1954 Identity Unknown - 1.19?
Inner Sanctum - 1954 Identity Unknown - 1.19 was released on: USA: 15 May 1954
Who are Brindleface's parents?
The true identity of Brindleface's parents are unknown because it is either unimportant or unknown.
